Eh...Wal-mart's my favorite. I would hope I like it - in this town I'm currently in, a college town, there's at least two Wal-marts around. ^_^;;
If I go out shopping for anything that's not art- or hardware-related (since there are better places around here for those things), then Wal-mart's the first place I check as it usually has what I want, and sometimes has a better selection than other places. While I'm not sure of it here, I know the Wal-mart back at home usually has more things to choose from than the K-mart (though, on the other hand, with that K-mart there's a chance for me to get items at a discounted price due to my mom working there...employee discount, whoo).
As for liking the others, K-mart and Target are equal as a second favorite for me. Sears is out of this, since I rarely shop there.