Well, I tried Hardcore TDM and HQ last night. Let me save you all some trouble, if you haven't tried it yet.
Hardcore (anything) = 5 or 6 snipers/campers, 3 or 4 noobs running around getting wiped out. 1 or 2 decent players trying to actually capture the HQ and getting wiped out by snipers/campers.
I only ever played Hardcore in CoD4, I dunno at MW2, but I like it when people die when I shoot them.