It's not hard to imagine the smallest pigs as children and some levels do look as though the pigs are in houses so you have two large pigs and a few small pigs Then again, considering how many of them are wearing helmets and barricade themselves in forts, theyre probably just very low-ranking mooks.
Annoying Video-Game Helper: If you restart a level that you plan on completing normally without the use of power ups or any "Mighty" characters, the repeated notifications suggesting the use of a power-up (or in the case of Star Wars II, other characters) to pass the level can become this (especially if you're working for the perfect cascade to happen in a level or looking to make a score acceptable in leaderboards). What's worse is there is no way to turn these off.
In Angry Birds Epic, it's the Witch Doctor in Great Cliffs - 1. He's ridiculously hard to take down since he has a large pool of health, and his attack is enough to kill a single bird, therefore healing him a lot.
Also from Angry Birds Epic, the Shogun enemies. They deal a good amount of damage, have a high amount of health, and have an ability that allows all enemies a 50-50 chance of dealing a critical strike, meaning double or even triple damage. In addition, they have the passive ability that blocks low-level damage. This is made worse by the fact that they tend to appear alongside Ninja enemies...who have the ability to dodge high-level damage.
For starters, Bomb/Matilda is a very popular ship in the fandom. It more or less got a Ship Tease in the end of the Toons episode "Clash of Corns", where Bomb kissed Matilda on the cheek in the end of the episode. And even after Terence and Matilda became an Official Couple in the movie, this ship remains popular in the fandom.
Game-Breaker: Terence the Big Brother Bird is a pretty powerful bird that can break through wood, glass, and stone pretty easily, but thick structures stop him in his tracks. Combine him with the Super Seeds/Power Potions and the King Sling introduced in Angry Birds Friends and he's pretty much an unstoppable behemoth that can break through ANYTHING with ease, almost making it like a miniature version of the Mighty Eagle. The only real downside is that the Super Seeds/Power Potions and King Slings are limited, meaning if you want more, you either have to get one randomly each day or buy some.
When it comes to hunting for hidden objects that unlock special levels, the purchasable Tusken Raider in Star Wars II works wonders. Simply launch him anywhere, touch the hidden item on the level, and it's yours in an instant.
Germans Love David Hasselhoff: Beloved in Spanish-speaking countries, to the point where in Mexico in 2012, the game did a promotion with Vuela Tazos (the Mexican equivalent of pogs).
Ho Yay: Red & Chuck. While this hinted in the first episode of Angry Birds Toons where Red gave Chuck a warm hug after latter rescue him from the fall, the infamous "Miracle of Life" episode took this Up to Eleven where Foreman Pig kidnap both Red & Chuck and force them to "mate" so they can produce an egg for the pigs. While Red is pretty much annoyed by this, Chuck is rather... flustered by the thought.
Jerkass Woobie: The Pigs. They just want to eat, and get pummeled into the ground as a result.
Les Yay / Foe Yay: Stella with Gale in a trailer for the April Fool's "Agri Birds" game.
This even hinted on the Angry Birds Stella animated series where Stella misses Gale dearly when she left the flock despite her hatred toward her betrayal, and vice versa with Gale despite she wanted to become the queen of Golden Island. There also some pictures of their moment together on both of their tree home shown in the second episode and in the finale, Stella decide to free Gale from being turned into gold despite her friend & Gale's own minion pigs refuse to do so.
Most Wonderful Sound: The music that plays when you either clear an area (before the December 2011 update), or achieve Total Destruction (three stars in each level of one chapter).
The Boomerang Bird, to the point where its awkwardness is lampshaded in a cutscene from Seasons.
Purchasing "The Mighty Eagle" and attempting to get "Total Destruction" on every level of Seasons becomes problematic when you reach the Chinese New Year levels and the Eagle is replaced with a Dragon, which has a completely different pattern of movement.
The marmosets' ability to regain their balance in Angry Birds Rio, sometimes even after you've blown them sky high.
For every time you reach a Wall of Pigs level in Stella (every 12 levels on average), you will see Gale and her Bad Piggies dump a smoke bomb on the wall, causing a large cloud of purple smoke to appear. You must either wait up to 6 hours for the smoke to clear itself or spend some Gold to clear it instantly, the price increasing the further into the game you get.
The life system in Angry Birds 2, which requires you to either wait 30 minutes for them to refill or pay up for more.
Serial Numbers Filed Off: The developers reportedly ganked the physics engine used in Castle Clout and Crush the Castle.
Sidetracked by the Gold Saucer: It's easy to get so caught up trying to get the bonus level by hitting the Golden Egg (or any other hidden item) that the actual level has to wait.
Surprise Difficulty: Cute, colourful graphics, a silly premise, and some maddeningly hard levels. At least you have unlimited lives.
That One Level: Just how many times have you wanted to curse the level designers while attempting to get three stars on any, just ANY level that goes into this category? The number of such levels is pretty huge, in fact, and it's a lot easier to lose count than rather list them all.
Particular example. Level 3-5 stands out as being one of the most Googled levels, and that should really say something. Heck, a lot of World 3 counts.
In terms of collecting stars, almost all of the levels in "Mine and Dine" (when in some levels, a score of 100,000 still gives you 1-2 stars) and some levels, such as 2-12 and 3-1, are incredibly frustrating.
There's a particularly ludicrous "Mine and Dine" screen where the only way to get a three-star score is to launch a bird backwards off the screen and activate its special action blind.
Golden egg 5... You can go for hours ending up with one pig left every time.
A very minor example, pertaining to the win screen. In versions before the December 2011 update, the area completion tune played after winning each level. Later updates would change this to a generic win screen similar to Rio, with no music, appearing after completing one level. The area completion tune plays when you beat an episode though.
The greater presence of in-game video advertisements in newer installments of the series that would interrupt the game before starting a new level. It also led to games which previously didn't feature these advertisements (Seasons, for example) being filled with them. There is no known way to disable them, even if you previously bought a "paid" version of the game or any in-app purchases.
There exist fans that believe there should be versions of Angry Birds that include all the series' canon birds in one game (the original flock, the Stella flock, the Ice Bird from Space, and Silver from 2).
The "Birdday Competition", made for the fifth anniversary of the original game, gives fans a chance to finally make their own levels for the original game. No, it's not a Level Editor, but rather a one-time contest that requires players to create an image describing how they want the level to be built by Rovio's dev team, including said designs being restricted to one of twelve pre-made themes. Any attempts at requesting Rovio through e-mail to create an editor (regardless of what platform the editor would be made for) will be immediately shot down.