As far as Shopping Centers go, Tempe Marketplace is pretty great.
Since we have the luxury of great weather in Phoenix, locals (and snowbirds alike) can rejoice in getting some Vitamin D while shopping at this outdoor mall.
The selection of stores, while limited, are the good ones anyhow.
The atmosphere is fun, spirited, and lively. Maybe because it's close to ASU, there are fun places to have a drink(s), and you have a Harkins you can pop into for a little cinema magic? All I know is, I'm a fan. For those of you wanting a low key vibe, spend a few hours in the bookstore.
One last thing...the Target here stays open later than other locations (11pm). Bing bang boom!