You have to pick:

Ugh. I'd only be sentient during winter. No thanks.

You're sentient as a tree too, though in a sufficiently tree-like way that you don't go nuts from not being able to move. It's maaagic.

This has got to be one of the best options, seeing as most of the ones it ends up with would be cool if everyone could do.

This would have some drastic repercussions to society if it happened to everyone on Earth. My main concern would be agricultural - farmers wouldn't be able to tend their fields during summer, and the rooting/de-rooting times might even interfere with planting and harvest times. We'd only need half as much food though, so that may somewhat ameliorate the problem. Another concern is personal safety in tree form. If everyone's a tree, what happens if there's a major fire in the city? What about the inhabitants of drought-stricken areas? Caterpillar infestations eating leaves, or worse, elephant infestations knocking trees down? Not to mention the infrastructure damage from all those roots growing and retracting every year and from everything being left unattended during the summer.

So, although having it happen just to me is sucky, it might be best in the long run.

well whens harvest???? :D

Except there are a lot of bad options on this site too.