All the time. It's just far, far cheaper. Since I live about a 5 minute walk from a city centre now I do spend more time browsing actual shops, but even then half the time I'll see something cool, go home and order it from Amazon. There's a damn good reason the likes of GAME and HMV are going bust.
It's just clothes and shoes and things I never buy online. Kinda need to be there to get those.