Same here. There's something 'off' about it, compared to google reader, that I can't put my finger on, but it's good enough for my needs.
The showstopper for me is the lack of infinite scrolling, although only today (after using NewsBlur for several months!) did I realize it's apparently intentionally crippled so I'd go upgrade to the premium version.
I got a premium NewsBlur account primarily because it was the only non-google reader with good keyboard support. And I kind of like the attempt to add social and commenting features.
But I might move away if I can get a cleaner UI with full google reader-style keyboard support.
This problem could be solved with a 'minimal' skin, perhaps?