Got to agree that this is my major gripe with Snow Leopard, really like the white on black Dock right click menu's and annoyed that Apple didn't uniform them all, why are right click menu's everywhere else the normal black on white, plus add to that the black window theme for Quicktime X and it starts looking a bit mismatched. It's a shame as if they had done a complete theme with that, I for one would have been very happy. Also noticed my MBP runs a bit hotter than it did in Leopard. Last gripe is that you still have to log out when switching between the 9400m and the 9600m gt, would have thought they'd have fixed that.
However it is just 2 minor things and an aesthetic issue, overall I like SL, generally feels faster and more responsive, like all the little minor tweaks and additions, plus think it's a good solid foundation and really stable: no crashes for me
Can't wait to see how it handles in 6 months to a years time once GDC and Open CL is properly utilised by publishers.