Leprechauns, cause of my Irish heritage.
I would make elves because they are cute to, lol.
Unicorns because they poop gold.
Vampires! (The scary/ cool kind, not the sparkly kind)
Doctor. Fucking. Who.
TARDIS, Sonic Screwdriver, K-9, the whole shebang. I would make Doctor Who a real person, a real honest to goodness time lord.
That would be awesome.
Wendigos. Wendigos are badass. That is all.
"Angles" already ARE real. Angels - not so much. And it's etc., not ect. Seriously, I would make elves real so there could be somebody I'm taller than.