meh, if i ever do get colluseum, it'll only be for a couple of reasons.

1.) Salac berry. MUST get my hands on that.
2.) Celebi.. yay... </sarcasm>
3.) Catching the GSC pokemon that ARENT in FR/LG
4.) Next-level battle simulation, although the game itself will most likely be ridiculously easy because the cpu's AI is nowhere near that of a competitive human player, judging by stadium & stadium 2's AI.
5.) utility purposes (extra tms, berries, trading, etc)

otherwise, colluseum is a flop imo.