There are several possibilities available when selecting a super power for one's self. This post is my contribution to the study--perhaps if you can see my motivations, it could help you to choose your own. Afterall, heroes and super heroes are popping up everywhere these days.
But come to think of it, unless you're a mad scientist whose had his funding pulled and you turn your dangerous project on yourself in a last ditch effort to salvage your work--then you really don't get to pick your power, it gets chosen for you by birth, or accident.
But let's say that you did have a choice--what would you choose?
Now this is just me, but I think shape-shifting would create a disconnect and discontentment with my true self. I think it would be hard to keep your bearings as you change appearances. It might even alter your identity in the process. This is not for me.
And other then self-defense, I'd have no need for shooting rays, unless I wanted to fight crime, which I don't.
Invincibility would be nice, but it's kind of boring unless you're involved in a lot of fights or reckless behavior and are often about to die or actually do die. Not my cup of tea, so I would only need this power as I got old. But who wants to sit on a power that long?
Psychic powers would be cool! Mind control of others and the ability to
read people's minds would be great fun. But after a month or 45 days, it might become overwhelming and disconcerting. I don't know if I'd like to know what everyone thinks of me, really. They probably think I'm a nice guy inside their heads, but maybe they think I'm boring and they just laugh at my stories to be nice. Or maybe they're actually thinking about something else while I'm talking? And what if I can't focus on telling my story because their thoughts are distracting me? Then I'd have to use mind control to get them to pay attention! This would mean that their reactions to me would be fake and controlled by me. And what's worse, knowing that someone is being fake, or being fooled because they're humoring you? I'd rather be humored by a good faker than know that I'm being faked--especially because of mind-control. So I might as well stay as I am.
Magnetic powers like Magneto would be good for "world domination," but so many things are made out of plastic these days so I wonder if magnetic powers would only get you "continent domination" at this point. And there's always so much anger and aggression in the faces of those who use this power, I'd think you'd get headaches a lot. No thanks.