I don’t even use oil in the pan, as long as it’s non-stick you don’t need it. It’s barely dirty at all when you’re done, a quick rinse and dry will clean it up.
The flip method is counter-intuitive, it seems like the cheese would stick to the pan, but once again, as long as it’s non-stick, it’s fine. You don’t want it to sit cheese-down for a long time, but it does help to melt the top of the pizza without burning the crust.
Usually the microwave. I prefer it in the oven, but I hate cleaning the oven so I try to use the oven as rarely as possible!
We were trying to politely ignore your freakness. Never heard of such a thing, and I eat a lot of pizza, including slices reheated in the oven.
Moving from IMHO to Cafe Society.
Just turn your toaster on its side. 
Cold, right out of the box where you left it on the counter the night before, after remembering to close it tightly to prevet the cats from stealing all the toppings. Cold pepperoni/pineapple pizza for breakfast is a Food of the Gods.
Toaster oven for 1 or 2 slices. Regular oven if it can’t fit in there. Microwave pizza comes out all soggy and nasty.
Can you turn the toaster on its side and reheat the pizza that way?
Bwuh? Make it at my girlfriend’s all the time. Comes out like regular toast. What kind of problem are you having?
Fresh > Toaster Oven > Cold > Microwave > Toaster you need to throw out/clean because there is melted cheese in the bottom
One with an easily-pinched tongue, perhaps. 
I’ve always hated reheating in the microwave, but the over-range microwave that came in my new place has a “reheat pizza” setting that actually works really well. Yay. Plus I don’t have a toaster oven (may get one soon, so little counter space though) - and actual oven is a pain to warm up. If I’m reheating pizza, chances are that I’m in a hurry.
Microwave for me. I usually only have 2 slices. I can’t justify heating the oven for that.
I do use the oven to reheat a whole pizza for family/friends.
Reheating pizza is just a vain attempt to make it closer to the fresh item. It don’t work. Leftover pizza is always best cold.
I don’t own a toaster oven, so microwave is the only valid option for me. Though I have had toaster oven warmed pizza before. Didn’t notice a difference from microwave heating.
The skillet method sounds interesting. Do you pre-heat the skillet before putting in the pizza or put it in a cold skillet? I may give this a try one day.
I agree adding a few drops of water helps freshen the pizza when it reheats.
Cold pizza. It’s not just for breakfast anymore.
Toaster oven on a preheated pizza stone.
Who reheats? I don’t even refrigerate. Room temperature pizza straight from the box is the way to go. (Or was, before I got married.)
Try the skillet method. Seriously, it works. It’s like fresh pizza.
I might pre-heat for a few seconds, but it doesn’t really matter as long as you put the crust-side down first.