I'm a browser, both in person and online. At least mainly I am. There are exceptions, like with clothes shopping I much prefer to just get it over with as it's both uncomfortable and uninteresting for me (and I really hate going clothes shopping with people, because I always end up standing outside the changing room pacing impatiently). Sure, I care what I wear, but I don't like the process of looking for clothes. There's just too much fitting room trauma there of standing there with a pair of pants stopping mid-thigh (and don't get me started on the bland, shapeless tents they store in the pitifully named "big is beautiful" section), so whenever I find something that fits me well, I aim to stick to it.
However, put me in a gadget store (I'm a sucker for nifty gadgets and figuring out storage and organization solutions), a game or video store, and I'm all about the browsing. I have less love for the dusty clearance bins now than when I was younger, I still love a bargain, but don't feel the bins are worth that thorough search, not when I generally find better deals online anyway.
I'm also a bit of both in terms of purpose and coming home with bags of things. Sometimes I have a specific purpose and I might stick to it, other times I'm just browsing to kill time or just because it's been a while and then it's all down to whether I find something good or not. Of course there are plenty of times where I just browse and don't purchase something, it all just depends, really.
What I enjoy with shopping is 'the find'. Whether it's tiny boxes to put into my boardgames to organise them, or some nifty item to help change something at home, or some new project, or simply a new game or movie to enjoy. It can absolutely be something I set out to get, or it can be something I discovered while browsing, both are equally good to me.