I like to browse blogs, but usually I look at the " about" information and read a few posts to see if they are posting information that really interests me, topics that I will enjoy coming back to time and again.
If not then I won't be posting a comment,, just took a look and passed on by.
If so, then yes I would make a comment especially if a particular post REALLY catches my eye.
Then I bookmark it and see what's happening on that blog for a few months ( or more ).. depends on how often they post...
if I still am really interested then it might get onto my blogroll... or I might just keep popping in on a regular basis from the bookmark.
For me it's more about the CONTENT being worthy of me coming back and not just getting a " hit spike" of X hits on your blog ( or my blog) on a given day.
Lots of people out there are " window shopping" on blogs, that's fine, comments are only the tiny bonus that you didn't count on getting ( or shouldn't count on getting)
If you keep 'em happy they will come back.. simple as that, yes?
Have fun blogging... if anyone hitches along for the ride , then that's bonus :)