Hearthpwn

I'd suggest going on hsreplay and/or viewing some YT clips of a deck you're interested in. I used to love to play Rogue but the only good current builds (that is if you don't want building a deck yourself which may be tough since you've not been keeping up with the meta) are pretty boring to me. In general, I'd say it's up to preference whether you like aggro/tempo/combo decks. I'd say it's more important than class since there are fewer competitive archetypes for each class than in the past (my opinion only)

That being said - rotation is coming so the meta will probably shift