I have a light zip-up jacket in bulky yarn that gets a lot of wear, as do the various hats I've made. I just finished a cowl, which I expect to use much more frequently than all the scarves in my closet.
I made a pair of worsted weight socks this past winter just to see if I could (I can, but I don't much like it); however, they are probably the only socks I'll ever make. So as you can see, socks are not on my "must have list," especially since I didn't find them (even in the heavier yarn) to be warmer than the mohair socks I can buy.
Things I would like to someday have in my closet include a convertible, a light cardigan, and a "favorite" sweater.