I'm completed out, myself. I have complete runs of The Defenders, Avengers, and Iron Man (original runs only; 1-402 and 1-332). And a full set of Godzilla autographed by Herb Trimpe.
i've parted with many smaller sets after completing and reading them: Champions, SuperVillain Team-up, Secret Society of Super Villains, Morrison's JLA, West Coast Avengers, Elementals, Justice Machine, etc. I have a couple completed but yet to read Marvel's Doc Savage, and Jonah Hex from All-Star Western 10 thru Hex 18. It was near-complete when I acquired it, so I finished it.
There's also a full set of Silver Surfer 1-18 but that's getting sold in a week or two. Buyer saving up.
Avengers, Defenders, Iron Man maybe Godzilla are around for a while. Other than that, I'm chasing my grails, some unicorns (obscure books) and a few readers I've always wanted.