The MGS stuff is okay. I'm not much of a fan either. The Rogue Leader game wasn't anything new on the GC. I hope the new one turns out good. This one really is a "new" game. Rogue Leader was, for the most part, a better looking version of the N64 game. But Splinter Cell did disapoint me greatly for the GC. I was looking forward to my first GC-GBA mix. Now that's over.
I think all three systems have something to offer. The PS 2 is the top dog though. If it weren't for my love of on-line play it would be my #1 coice out of the 3.