I got the basic one (Bamboo) with the smallest possible size (I think it's the 4x6 one). If you're doing design and other complex tasks, it's probably better to have those large ones. For me though, since I only use it for general computing and the occasional design work, having a small one makes it portable (and it fits on my desk!).
Unfortunately though, after years of getting used to the mouse, I do find it hard doing detailed work in Photoshop (i.e. tracing something/colouring something). It probably has to do with me not being used to the tablet but in times like those, I (using the tablet) still don't have the dexterity to manipulate things as well as when using a mouse.
Saved me from carpal tunnel syndrome (I already had the early signs).
Inkjet Printer => LaserJet Printer
Didnt't realize how much I was missing. The time savings alone makes it worth it.
Design Major => Psychology Major
Sometimes it's true what they say, everything in moderation. Once I left art school, I found my passion for design again.