I have done that, yes...but I've more often done the opposite. I will try something on and think I like it and after about 30 minutes be changing my mind. Or sometimes I will buy something and think I've found a keeper and a few days later realize it isn't as great as I thought.
I think that's why online shopping works for me...it gives me time to sit with something. I can try it on several times and let my feelings sort themselves out. I do have a lot of returns, but almost every time I've been on the fence about something and talked myself into keeping it, it has never ended up being a favorite.
My one success on that this summer has been a JJ tunic I was a little unsure of and have ended up really liking. But I also have several things I cut the tags on and washed too soon, and wish I could return.