I do think this is kind of like asking what child you like best. It depends on what view you are paying for and what you want/or want to avoid I think. Adventure is closest, Fantasy has the store in it, Frontier premium has view of both the pool, and the park, and you see fireworks. I have only stayed Frontier premium and like it. For curiosity sake, I asked for adventure this time, and they stuck me next to the same room that I was last time, in frontier.
Adventure the views are only of the pool or downtown disney-so for a standard view that would be the best. Frontier standard you could get a parking lot.