I wanted to ask this question a while ago.
I kinda got used to CS1, I like it.
I got Photoshop CS2 from a friend and I hated it, the Bridge (is that what it's called?) takes too long to browse. Then my friend said that it's ok to stick with Photoshop CS that some people just like what they're used to and they work better. Some people still stick with older versions of Photoshop.
I guess it's the same with Indesign.