What are some things you don't like in videogames?

[Roflinator]

Repetitive levels (I'm looking at you, Sonic Advance 2 and Heroes)
Pointless playable characters (*cough* Amy in Sonic Advance 1 *cough*)
Plots that ruins the game (MMBN4. Most of the entire plot was about tournaments, not really fun and it gets in the way so damn much, the game sucks. Ugh)