What are some cool games for Xbox 360 that's not boring or get tired of playing?

I want quite few games but I'm only getting one,here's some I have on mind,NBA 2k11,NFS hot pursuit,Shift 2 unleashed,nascar 2011,mortal kombat which one should i get out of them? or if you know any better games let me know,What are some cool games for Xbox 360 that's not boring or get tired of playing?
Try getting an RPG. Borderlands is a great shooter rpg and oblivion is probably my favorite game of all time. I put over two hundred hours into oblivion and close to a hundred in borderlands and i still love playing both.
Need for speed hot pursuit is not good it is short and boring mortal kombat is long and fun to play.What are some cool games for Xbox 360 that's not boring or get tired of playing?
First person shooters- Halo, Fallout, Left for dead. RPG- Fallout, Oblivian, Final fantasy 13

Fighting Games- Super Street Fighter 4, Naruto Shippuden Ninja Storm 2, Naruto The broken bond

Racing games- All Forza Motor Sports

Action games- Assassins Creed, Brotherhood

Microsoft Purchasable Games- Bomber Man, Uno, Castle Crashers, Marvel vs Capcom, Mega Man,

Gauntlet

(All Microsoft games must be bought with Micro points)What are some cool games for Xbox 360 that's not boring or get tired of playing?
all those gets games get pretty boring after a week or 2 theres not really that much of action unless your into that stuff...instead you should get games like call of duty black ops..or call of durty mordern warfare 2 or halo it never gets old and has alot of add ons