I think I'd rather trim my powers to something more managable. Complete Arsenal seems more like an end goal, rather than something I'd want to start with. After all, if you have everything, what's next?
Hmm...having every single power is...boring. I'd probably seal away (or maybe give away) most of my powers, and keep a select few. Immortality, Animation, and Personal Gravity. Because...living forever is awesome, animating things is a versatile ability, and I want to fly.