I pluck in between. Not that I would have a uni-brown, but there are a few stragglers that need to be pulled out of there.
Regarding shaving/trimming my eyebrows... when I get my hair cut, I've always gone to a salon. Supercuts, and places like that, have always butchered my hair and my hair is not easy to cut (it has a mind of its own). When I moved to New York a number of years ago, I went to a salon and the guy took a small comb and trimmer and trimmed my eyebrows. I was in my mid-20's and that was the first time anyone has done that! I was kinda freaked out by it because he didn't ask. Anyway, I really liked it.
Sadly, that was the last time I've had it done. I don't trust myself to do it myself. If I cut too little/too much off my chest, then no one notices. Eyebrows, people will tend to notice if one looks off. ;-)