Twitter: tempting or turn-off?

I'm still not sure I understand twitter. Recently, however, I've started reading "tweets" from various twitter accounts. I have to admit, I am intrigued.

Then I came upon this post by Cath over at VWXYNot? I can has superpowers? From twittering? Sweeeeeet.

I don't know what to do. If I start twittering, will I acquire superpowers, too? Will I get to pick if I want to use them for good or for evil? And if so, which should I pick?