OK, guess I'll get some thoughts down for the series.....
Season 1- Too short, but awesome. I know it was meant to be a miniseries, but damn I wish they had stretched out some of the initial story lines, and covered more of the breakdown of society, it's always one of my favorite parts of any post-apocalyptic tale.
Season 2- Solid, though the Sophia story was a bit dragged, and I felt that the farm was a bit too safe considering how fucked they were in every other living situation. Good ending to the Sophia storyline though, really set a somber tone for the coming tales.
Season 3- Good stuff, governer is such a dick man, love him. Michone quickly became a favorite of mine as well.
Season 4- So lame they had to kill Herschel, but my favorite season otherwise, a lot of the tales seemed closest to what this reality would really be like. Especially loved the episode with Carl and Rick in the house and the one with the two little girls, Tyrese, and Carole haunted me, having the one kid be a psychotic killer was spooky as fuck, and the scene where Carol had to put her down, just brilliantly done.
On S5, E2 now, like that they are going to draw out the cannibal storyline, should make for some epic shit.