all i can really say about Obama is that the other choices really, really sucked. first it was an unapologetic hawk who bordered on a war monger. the next choice was an out of touch plutocrat. Obama has done a couple things i liked, such as scaling down the wars and not getting heavily involved in a new one (though the jury is still out on that.) also, i like that he fought for health care reform, though the final compromise is a POS and should have been vetoed. his stimulus also saved my ass, and i was able to afford COBRA because of it. he also doesn't seem to be actively going after the states that legalized pot.
on the negative side, he's been fairly bad on civil liberties, continuing the patriot act; the NSA, et cetera. he signed the unworkable PPACA, tossing it to for profit health insurance corporations and leaving in place the employer specific system. also, there's a chance he won't pull the troops out of Afghanistan, and this option shouldn't even be considered.
i guess i'm still forming an opinion. right now, i like him better than Bush and not as much as Clinton.