360 Woes (help needed)

[AceLuby]

Ok, so I'm going to go buy a 360 today and have been researching the great library of games touted on this forum. Looking at the top scoring games this is the list of the top 10 (genre only)

Role-Playing
Sci-Fi First-Person Shooter
Modern Tactical Shooter
GT / Street Racing
Modern Tactical Shooter
Sci-Fi First-Person Shooter
Sci-Fi First-Person Shooter
Rhythm / Music
GT / Street Racing
Historic First-Person Shooter

Ok, so I have Obivion on PS3, GH2 on PS2, don't like racing games, have Resistance on PS3 and am buying Halo 3 today, so I don't need another shooter. Please recommend me a good game on the 360 that isn't any of the above. Either a good 3rd person action/adventure game or a good RPG. I would also like to either have a lot of replay value, or a game that takes 25+ hrs to beat. Please help me.

Also, wtf is up w/ the good games on 360 either being shooters or racing games (beside oblivion and GH2)? I love a good 3rd person game, are they falling out? Anyone have any insight why they are getting worse?