1. that was before he became president
2. Quite a nice example of the kind of justice the USA likes to export
3. Extremely limited reform, check on France, the UK and Canada for other options
4. Too big to fail, who else would have done so?
5. Gays & Lesbians, Transgenders and Transsexuals have a long long way to go in the US before parity is achieved. The fact that there was a don't ask don't tell policy in the first place was bad, repealing it is not a victory of any kind.
6. NSA -> that's Snowdens ball, Obama is mostly doing damage control. It's how this whole thread got started in the first place, by Obama claiming that this debate would have happened without Snowden.
History books tend to take the long view, 100 years from now the 'first non-white President of the United States' (which is something he achieved before becoming president) is the one thing that I think may just make it.
But given the opposition (Palin as VP was unthinkable to me, when they chose her as McCain's running mate they handed the presidency to Obama, and it is surprising how close it still was) it wasn't all that impressive to me.
Still, I'll concede that that is what makes his presidency noteworthy. If he'd only done something a bit more useful with the power that he wielded it would have been more impressive. Change we can believe in...