Of course I could pick a type of superpower that would grant me near-omnipotence only to be as OP as possible. But these meta-game thoughts aside, the one I´ve been always thinking about as the one I´d like to have was shapeshifting. I went even as far as to make up some limitations to this power of mine - so the overall mass of my body would have to be pretty much always the same so no massive enlarging or shrinking; and I could only shapeshift into forms/mechanisms that I can imagine or conceive so I couldn´t for example turn my hand into a gun cause I don´t understand the details of its inner workings.
Even with that, it seems pretty cool to me. I could turn into someone else to go unnoticed or enter restricted areas, I could slip through keyholes or under the doors or pretty much any small opening, I could turn my body hard enough to be resistant to most forms of attack, plus all the trickster pranks I could do and I could basically realize in real life all that silly craziness happening in cartoons.
Come to think of it, that may be an even better choice - the superpower of being like a cartoon (which makes you almost indestructible, gives you the ability to pull almost anything out of thin air and makes you do all sorts of silly stuff).
