I chose psychic powers cause teleportation would be cool skill to have. And Nightcrawler has always been my favourite character in X-Men
I think I wouldn't use teleportation to move long distances, but instead in short-range movements when you need to get out of the way quick - like when car is about to drive over you
Another nice skill would be automatical regeneration (a'la Wolverine) but usually it reduces your aging to minimum (as your body regenerates itself often and keep you physically young). I wouldn't want to live 500 years etc....that would be boring.