Funny, but virtually everything on your list would be a black mark as far as I'm concerned.
Health care reform, per the screwy mess shoved through congress, is going to be an unmitigated disaster. There's a reason that they didn't implement the majority of the reforms until 2014 ... they didn't want the shit to hit the fan before this election.
Ended the war in Iraq...after the Bush troop surge made it possible and on the same timetable that Bush was proposing.
Captured Bin Laden ... well I thought it was our intelligence operatives and the Seals that did it, but yeah, Obama gave the go ahead as any president would have.
Turned around the auto industry ... Ha! How many of you plan on buying an American-made car in the near future? He gave costly emergency room treatment to a dying patient. How many times are tax payers supposed to bail out the US auto industry?
Dodd-Frank ... I think the jury is still out on how effective that legislation is going to be in the long run.
Boosted fuel efficiency standards ... This one cracks me up because it's a typical Democratic approach to governance. See a perceived problem, pass a law mandating a change, and then announce problem solved while clapping yourself on the back. Get back to me when these laws go into effect and people start seeing the price tags to buy under-powered cars that don't meet their needs.
Improved America's image abroad? Curious, but that doesn't seem to mesh well with what I'm seeing on my TV screen on a nightly basis. Looks to me like a good part of the world hates our guts.
Education reform? Specifics please. Same with support for veterans.
Repealed 'Don't ask, Don't Tell' ... I don't have a problem with this, but I suspect that it just took the time since Clinton instituted that policy for national mores to change to where it's become viable.
Perception really is an individual matter, I guess.
For me, this piece on CNN pretty much sums up my major reasons for not supporting Obama:
http://www.cnn.com/2012/09/27/opinion/bennett-dont-vote-for-obama/index.html?hpt=hp_t3