The Raging Blast games. Proponents will point to the addition of customization for the actual movelists and use of What If? characters. Opponents tend to cite the lack of a large roster and less deep gameplay.
Ultimate Tenkaichi. Some people consider it better than the previous Raging Blast games, others consider it to be one of the worst DBZ games ever made with its Rock-Paper-Scissors mechanic instead of combos and strategies. It doesn't help that Hero Mode, the main attraction of DBZ, seems to have a plot which looks like a bad DBZ fanfic.
In Ultimate Tenkaichi, picking the "Crazy" voice option for your character in Hero Mode results in some pretty hilarious lines and sound bytes from the Hero. And even when he DOES say something relatively serious, his thick New York accent makes it very difficult to take him seriously.
In fact, depending on which voice you pick, almost any scene can come across as comedic.
In the first two games, Beam type Supers/Ultimates pass right through and destroy most Ball type Supers/Ultimates instead of beam struggling with them, as a result characters with Beam-type attacks tended to far outpace those without. This was fixed in 3, where beams can now struggle with ball attacks.
The bug with Cell's voice constantly switching to his imperfect form is often thought to be one that they just won't fix for some reason, when the truth is that it can't be fixed. Cell's Japanese voice actor used the same voice for all three forms — making them distinct was thought of by the English voice actor, so the Japanese-developed game didn't feel the need to reserve slots for what would have been duplicate sounds in that version.
During the story mode of Tenkaichi 3, Omega Shenron's voice sounds just like his original Syn Shenron form when speaking outside of gameplay. This is because much like Cell, Syn Shenron and Omega Shenron retains the same voice actor in the original while the dub both has two different voice actors for both forms respectively.
Most Annoying Sound: Any time a character is on a menu screen they're bound to constantly speak a phrase for whatever you're doing. This gets especially annoying in Tenkaichi 2's item shop, with Baba's "Is this okay?" "We have many others!" repeated over and over if you're buying a lot of items.
Narm: BT3's story mode has a system that allows fighters both watching and participating to spout off lines based on how the character is performing in battle or under certain conditions, but due to the lines triggering a few seconds afterward can get ridiculous because they tend not to match the action on screen i.e. a fighter making a Badass Boast while getting their ass royally kicked.
This can be quite apparent with the battles based on Dragon Ball GT. In this game, Super Saiyan 4 Goku is now a transformation for the newly-included GT Goku. If the deep-voiced SS4 Goku is getting beat up in a story battle, there's a chance that he will comment on this situation in his much younger voice that he would've otherwise had in any of his other forms.
Also, the player can set the game to be in either Japanese or English. The English voice actors give it their A-game, while the Japanese seiyuus just read their lines out loud. In a fighting game.
Pandering to the Base: The developers took in suggestions as to what or who should be in the games, which resulted in fan favorites like Nuova Shenron making it in, as well as some alternate costume choices (such as Goku's Yardrat outfit and Gohan's orange Gi from Bojack Unbound.)
Shout-Out: The plot of BT3's What If? starring Androids 8 and 16 is very similar to the plot of Terminator 2: Judgment Day — An evil army/scientist (Dr. Gero/Skynet) sends a robot (Android 16/The T-1000) back in time to kill the younger form of a hero (Goku/John Connor), but another robot (Android 8/T-800) protects him. Only difference is that 16 undergoes a Heel–Face Turn and survives.
That One Attack: "Mystic Combination", Kid Buu's Rush Attack, in Budokai Tenkaichi 2; the length of time in which he charges at you lasts an absurdly long time (enabling him to use it even at a major distance), and it homes in on the opponent. Exacerbated due to the fact Rush Attacks in 2 are unblockable and costs no Ki if you did not land the attack, as well as Kid Buu being one of the game's many Buus, which means he can charge his Ki up quickly and start the attack all over again after knocking the player across the stage, while they're still struggling to get up. The attack was significantly toned down in 3, lowering the time of the initial rush, requires half Ki consumption for the initial blast, the amount of damage given, the way the character lands prevents it from being used as frequently, and characters being able to block Rush Attacks at the risk of losing Ki.
They Changed It, Now It Sucks: The Japanese version of the games featured Shunsuke Kikuchi's score from the anime. Due to licensing issues, the international versions did not keep this. This irritated some fans. On the other hand, most people will agree that the score for Tenkaichi 2 was quite good.