I agree completely with every else. If it's a simple fix, I'll ladder down to correct it. If it's more complicated, I'll tink back if it's only one row, or frog it if it's more.
I was working on a belaro for my oldest daughter, and it seemed that every time I picked it up to work on it, two rows later I would notice a mistake in my first row. The problem with it was that it was purple mohair. Impossible to frog, a real pain to tink. Suffice it to say, it's been in hibernation for a little while.
All knitting that you are doing is your creation. Do with it whatever makes you happiest.