>>1867316well, the most common sense start is picking up a visual style since it's basically the most significant change you'll have on your shell, unless you're using a replacer (i.e. blackbox or litestep).
and then custom icons, cause the defaults are shit. if you're the sort of guy who stores music on your drive and not stream it online, you should also check a skin for your music player. with, of course, foobar being the most notable one out there
also browser ricing is essential, check out css(cascade style sheet) and 4chan userscripts for maximum ricing.
then some other interface elements, like rainmeter, but only if you know what you're doing. don't go full pleb
