I love my 28/AIS, and have had it for 25 years now! 28mm was my preferred focal length for film, but when I bought my Nikon dSLR 6 years ago, the 28 started collecting dust. Since I got my NEX, though, it's been one of my 'go to' lenses, even if the 42mm equivalent focal length is a little odd. I've only had my NEX a couple months, but here's a few of my samples:
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On the NEX, I love the sharpness which makes it great for textures, something I'm always drawn to (for better or worse!).