I try to pick up as many G.A. reprints as I can and have a lot of AC's output. Even though they're in b&w, it's good to have the stories and as my main interest is the more obscure hero or masked man, sometimes AC are just right for me. Like Ed love, I really enjoyed All Star Squadron and the S.A. JLA/JSA teamups. As for Project Superpowers, I'm losing interest, although the last couple of Terror issues were quite exciting and sort of captured the sheer bloody mindedness and purpose of the new version. But it's all too flash and everything so doom laden to be much fun, in my opinion.
Narfstar, I loved those 25c. comics and it was around then that my interest in American comics was revitalised, seeing all those great old heroes.
Happyhuman, go get as many Terror stories as you can cos he's great and the later 1940's run had some really good art despite the fact they sort of forgot he had super powers.