Being honest I didn't like WAW. It was ok,, just not amazing like COD4 was. I went back to COD4 multiplayer after a few months. I've played quite a bit of MW2 and I enjoy it. Most of the complaints are about "You don't play the game the same way I do". Thats for n00btubes (although mine are "pro pipes"), camping, sniping etc.
Yes, there are more campers, I think due to the map layouts and lots of hiding places. Thats what explosives are for. Even better, play as a team and agree not to go that way, he'll move or go 1-0 for 10 minutes play. Yes tubes can be annoying when fired continuously but you can always get yours out. Most of the problems level out in Hardcore team deathmatch.
I'm not hopeful for black ops. I don't think it will be horrible but it looks like more of the same from a developer who I think are worse than IW (who no longer exist). Lets face it though, everyone else you know will be playing it so you may as well get stuck in.
Or find a nice 1 player game for 6 months.
Also; everyone nut hugging WAW, how amazing it is compared to MW2, must have short memories as the start was horrible with everyone glitching out of the maps. It took forever to fix as well. It left half the maps unplayable.