Forum:Deck theme and strategy advice

Hi i am stuck on picking a theme and strategy for my deck. I did want to use dragons but am not so sure as i can't think of a strategy to use them with. Like burn decks or OTK decks. Could anyone give me any advice on how to pick a theme that'll work coz all i keep doing is putting together dark attributed monster cards but they all have random effects and the deck doesn't work.