Both, I have bought guns on a whim, some I loved, some not so much. Trade it sell it, move on, lesson learned. Well, maybe. No super regrets, just some I didn't care for, or didn't like enough to keep when funds where needed for another "Me likey" moment.
Bought a Trooper Mk III after buying a Trooper Mk IV off of GB because I never saw either around here. I liked the Mk IV, but didn't love it, so I bought the Mk III. I loved the Mk III, so I sold the Mk IV, and still have the Mk III.
I don't mind test driving something just to find out it isn't for me. So many things I would have never gotten to try if I waited for one to show up around here.