PvT: goon/zealot into carriers(or arbs) The occasional dt/ht/reaver drops are nice, too. Sometimes I can get away with fast expanding vs terran(especially if he fast expands himself), but can be dangerous so be careful.
PvZ: FE sair/reaver into carrier.
Sair/Dt into expo and play from there.
Quick tech to templars/archons.
I feel fast expanding is best vs zerg.
I have no idea how to play pvp. I played tvp instead. It helps to understand pvt better.