...how does a priest (the class as a hole, but most emphasis on the shadow part) compares to a warlock? i'm asking because i used to play as a warlock during the burning crusade and really liked it. i had to take a break for most of wotlk though.
so now i decided to come back and have a fresh start: new server(hated the old one), new faction and, maybe, a new class. considering the warlock was the only class i ever managed to level up all the way and do stuff with, i think a priest (mostly shadow) would be a nice replacement...so... any advices? (i like both pve and pvp)

ps:sorry for the lousy grammar. not my main language.