If you could have a limited amount of powers

[Celadon's Penultimate]

 There are means to combine certain capabilities, that's the only point I want to make.

Like maybe Molecular Manipulation, with a sub-power of Automolecular Manipulation (subconscious molecular self-improvement capability, like manipulating telomeres). It would allow psychic auto-improvement, as long as you subconsciously desired it. You could become denser, or intangible, manipulate metabolism to facilitate immortality AND invulnerability, and otherwise manipulate your world to awesome levels, given training.

All with one power.

[Gentleman Vaultboy]

Yeah, but if I got those I would have to use them for the greater good. Helping people and making the world a better place. And I'd do it, because I'm a sap. They'd be an obligation.

The powers I picked out would allow me to live a quiet life with a clear continence.

[Celadon's Penultimate]

 True enough, but you can always help good folks by pwning evil folks.