Well my fave ships are:
~ Jake and Lady Rainicorn ~ If it wasn't obvious, I love the pair and since Lady's preggers, it would be a drama bomb if they get separated. Besides, they're too intimate with each other to split... And my pair plays Jake while I play Lady Rainicorn since they're our fave characters respectively.
~ Finn and Princess Bubblegum ~ I also loved this ship since although it's overreaching, it is still cute.
List will be updated... :P