Adorkable: Scooter, a cute, geeky, glasses-wearing Muppet.
Alternative Character Interpretation: Is Professor Honeydew really as absent-minded as all that, or does he know full well he's hurting people (Beaker especially) and just doesn't care? The fact he often follows his actions with that little giggle isn't in his favor. Certain moments seem to indicate that Bunsen does indeed care about Beakers wellbeing, such as when he frets over Beaker being overwhelmed by the rogue president Lincoln robot during episode 206 of Muppets Tonight; perhaps he just considers scientific pursuit more important.
Miss Piggy is one of the most divisive members of the main Muppet gang. Some find her to be a incredibly fun and hilarious character on top of being a great female and feminist icon, while others found her to be an shallow and unlikable Jerkass who barely develops or faces any true consequences for her oft violent and abusive actions.
Kermit's nephew Robin isn't universally hated by any means, but some Muppet fans can be a little bit testy when he shows up. That being said, he's still more well-liked and tolerable overall than, say, Bean Bunny from later Muppet projects.
Replacement Muppeteers has always been a controversial topic, but Matt Vogel as Kermit is by far the most controversial case. Some don't mind Vogel's performance and have argued that he sounds more faithful to Jim's performance than Steve Whitmire did. Others however, hate Matt Vogel's Kermit, finding his voice to be incredibly off-putting and nasally compared to Jim or Steve's performances. The fact that Matt Vogel only became the voice of Kermit due to Steve Whitmire getting fired by Disney (unlike previous cases where it's because the Muppeteer either quits or dies) does not help.
Kermit x Miss Piggy is an incredibly divisive pairing amongst the Muppet fandom and bringing it up is a good way to set the fandom on flames. On one hand, many adore it and regard it as the One True Pairing of the franchise, enjoying their dynamic and their interactions with each other, while others deride it for being a straight case of Double Standard: Abuse, Female on Male, with Piggy constantly being violent towards Kermit for laughs. It doesn't help that the nature of their relationship is prone to changing Depending on the Writer, nor does it help that Miss Piggy herself is very divisive. Their infamous breakup in 2015 only made things far worse, with many arguing on who is to blame for the breakup and whether or not the breakup was a good thing or a bad thing.
"Common Knowledge": The Muppet Wilkins from the old Wilkins Coffee spots is often assumed to be an early version of Kermit, due to having a similar voice and appearance. He's not; in fact, Kermit had already existed for two years on the show Sam and Friends before the Wilkins Coffee spots started being produced.
Rowlf the Dog, largely because he was the first Muppet to reach national stardom, and he really doesn't get enough credit for helping to bring the Muppets into mainstream consciousness. Many fans lament his decreased role among the cast following Jim Henson's death.
For a Muppet that only appears once in a blue moon, Crazy Harry is pretty popular with the fans.
UncleDeadly. He didn't appear much in the original show, but he became somewhat popular, especially after his major role in the 2011 film.
While on the subject of Muppets originally performed by Jerry Nelson, Lew Zealand, a clown-esque character whose main (and only) schtick is throwing boomerang fish. While such a concept is certainly odd and even tedious, Lew does his act with such goofy gusto that it's hard to hate him.
Given that Jim Henson is involved with all three, share many of the same staff and puppeteers and the three shows have crossed over numerous times, the Muppet fandom is heavily intertwined with the Sesame Street and Fraggle Rock fandoms, to where the fanbases are often grouped into one big fanbase instead of individual fanbases.
Muppet fans and Star Wars fans tend to have a very good friendship, given that George Lucas and Jim Henson were friends in real life, on top of several Muppeteers, most notably Frank Oz, being involved with Star Wars. It helps that two franchises have crossed over at one point on the The Muppet Show (and have had merch collaborations), as well as the fact that they're both currently owned by Disney.
Due to the group being a Found Family of weirdos and misfits who come to care deeply about each other in spite of their differences, it should come as no surprise that the Muppets have a large following amongst the LGBT community in general. It certainly helps that the Muppets have a very pro-LGBT stance, with one of the original Muppeteers, the late Richard Hunt, being gay himself.
Gonzos status as a whatever and his struggles with identity has made him very popular amongst the non-binary community. Muppet fan site, Tough Pigs wrote an article about it that goes more in-depth. A few bits of canon even explicitly name his gender as "whatever."
Hilarious in Hindsight: The technique Henson and Oz used to operate the Swedish Chef became a game on Whose Line Is It Anyway? called "Helping Hands", letting the audience see firsthand just how much dexterity was required. This technique predates both shows.
Bunsen and Beaker have countless examples, including Bunsen calling Beaker petnames, Beaker going on a pretend dinner date with a fake Bunsen in the Flowers on the Wall music video, and even Bunsen kissing Beaker on the cheek during a live show. Theres so much of it that both Tough Pigs and the Muppet Wiki have articles devoted to the romantic aspects of their relationship.
Memetic Mutation: Among the Vinesauce community, Kermit being the father of streamer Joel due to his real father having a similar voice has become memetic.
Plenty of Swedish viewers love the Swedish Chef for just how over-the-top ridiculous of a stereotype he is.
It's pretty much an accepted fact that no one loves Sam the Eagle more than his fellow Americans.
Overshadowed by Controversy: Any discussion revolving around Matt Vogel's Kermit is guaranteed to become overshadowed by the controversial firing of Steve Whitmire by Disney and the publicized fighting between him and Disney/the Henson family in the months following his departure.
Jim Henon's The Muppets, released for the Game Boy Color by Take 2 Interactive in 1999, doesn't fare much better. The game's plot involves Kermit and Animal trying to rescue their friends, who have been taking to different time periods by Dr. Honeydew's time machine. The game suffers from clunky controls, sub-par graphics, horrible music, enemies that take way too many hits to killnote not helping matters is that you have to keep restocking your ammunition, which comes in the forms of either paper planes or drumsticks, and poor level design. Every level is a huge labyrinth, and Kermit and Animal take damage from falling from even the lowest of heights.
Signature Song: "Halfway Down the Stairs" for Robin, which even became a Top 10 hit in the UK in 1977. For Kermit, theres "Bein' Green" and "Rainbow Connection".
Theme Pairing: Scooter and Walter make a somewhat popular pairing among fans on Tumblr and Twitter due to them both being younger human-based Muppets with similar personalities.
Tough Act to Follow: Steve Whitmire had the unfortunate luck of taking over Kermit after the passing of Jim Henson, who was practically intertwined with Kermit. While many considered his performance as Kermit to be good (particularly later on), its near-universally agreed that he just doesnt stack up to Henson. History repeated itself again after Whitmire was fired and Matt Vogel took over as the frog, in which he received a similar reception to Steve.