My opinion of him will be based highly on his position is regarding the automakers. Telling them to go home and come back when they actually had a realistic plan is a start, but if people think the banks are bad when it comes to using government aid as a crutch, I feel US automakers are twice as worse. They are the ultimate solve-the-short-term-problem-instead-of-the-long-term-problem industry (as they have proven many times over) and will only use any financial infusion to keep trying to fend off efficiency regulations. I unfortunately truly think that one of the big 3(likely GM) going under will be the only way to truly induce reform.
The wisest rebuttal to this that Ive heard mentioned how this failure will in fact retard US growth in manufacturing greener cars, but I still forecast a lot of GMs business being picked up by Ford.
Couple other things off the top of my head:
1) He may not have extensive Wall Street experience, but does have quite a bit with the IMF, which I value a lot considering how globally linked stuff clearly is
2) Lawrence Summers (your classic good behind the scenes, terrible as your face man) also got tapped for a high position. This I like because he is definitely the type who will make the smart decision instead of the popular one.
As always just my $0.02.