Pineapple & bacon/ham is quite good, as is black olives & mushroom (or black olive & bacon) but I'm still very much a pepperoni & mushroom pizza fan.
but I know that it is no good because a friend of mine has heated a frozen one in his toaster (as he doesn't have a oven) and after two minutes of toasting the cheese was really gluey and slow, which made the whole pizza sluggish.
whatever it was you put in that toaster, it was not a pizza.
I would never put anything called pizza into a toaster.
Frozen pizza ( and I'm sure there might be some almost half-decent brands ) will never compare to pizza from a bona-fide pizzeria - either italian or greek, they seem to have a handle on what makes an incredible pizza.
... now what's for breakfast... hmmm... where is that pizza box....