This isn't really "street photography" per se, as it didn't really happen on the street (Shanghai World Expo). But the idea of non-offensively capturing people in the middle of what they do is something that I wish I could do better.

However, a lot of the time I become too self-conscious about other people becoming self-conscious about me taking photos of them when they don't know who I am.

Some people say that using a less intimidating camera (i.e. not a DSLR) helps people feel more relaxed. Or if you must us a DSLR, at least not with a telephoto or anything large and intimidating (pretty much any fast zoom or fast portrait lens). But sometimes I feel that a photo is a photo and people become concerned with why you are taking a photo of them nonetheless whether it be with a Canon 1D MK IV or with an iPhone.

Sometimes I feel like I just want to try running around with a 50mm prime again (as in the photo below). I haven't done that for a while.