For me, yes. Some Pokemon are so incredibly over used, standard and boring that I could never be bothered to raise/train/use one. I always like to be unique in multiplayer games and use the characters who aren't over used(i.e. I could never use Fox or Marth in SSBM). I know that this decreases my chances of winning and being succesful, but its just a game. If it takes being boring and doing what everyone else does to win, I won't play(like snaking in Mario Kart). I just want to have fun! Using boring Pokemon to me would not be fun, win or lose.
The following Pokemon I could never be bothered to use:
Bronzong
Blissey
Cresselia
Garchomp
Metagross
Salamence
Snorlax
Suicune
Swampert
Tyranitar
Any Legendary/Event Pokemon
The following Pokemon I could never be bothered to use:
Bronzong
Blissey
Cresselia
Garchomp
Metagross
Salamence
Snorlax
Suicune
Swampert
Tyranitar
Any Legendary/Event Pokemon