It's either BC2 or ME2 for me.

Cant make up my mind.

I went for Bad Company 2 in the end.

It's a well supported game, then, now, coupled with a decent expansion(Vietnam) that will give you a completely different experience from normal BC2.

Tonnes of free maps, plus 4 brand new ones that feel so old school battlefield. Those 4 new maps are filled with tanks, helis and lots of epic battles. It has made me love this game so much.

This has already put BC2 far far ahead of BO.

Mass Effect 2 is very close to BC2, for me, as it has a really well paced story and some memorable moments and characters.