Oh that's right, Battlefield. Such variety. Then there is TF2, but it has lost it's shine has become a item collecting game.
first of all, I didn't say anything about there being an incredible amount of variety in the genre
secondly, there's halo, crysis, section 8, homefront, ARMA, bioshock, far cry, resistance, borderlands, half-life, counter-strike, MoH, and timeshift which is particularly interesting
but I'll stop, I think I've made my point by now