I think many of us have spent many an hour thinking about having jutsu. Let's take some time to think of the adverse effects of jutsu.. as in other people discovering your power and becoming hateful in their jealousy. It's this thought that helped me think of the best jutsu to have. Obito's Kamui. Won't get hit, you can go anywhere without a seal.. sounds pretty awesome to me. Growing a tree doesnt sound like it will do much against, say, a nuclear warhead. Does the fact that my eye is a sharingan, and therefore comes with other sharingan treats have anything to do with this decision? Yes, yes it does.
On the other hand, I would like the shadow clone technique, but knowing my personality, none of my clones would want to be the one doing the work either..