It was good until it started trying to be Z 2.0. Trunks, Pan and Goku travelling around the galaxy making new allies would have been a great setup, but it was ditched in favour of awful Z style sagas.
I like GT too but its pretty bad. I mainly watched it for SS4 Goku which is one of my favorite designs in the franchise with LSSJBroly being a close second and SSJ Future Gohan being 3rd.
I would have liked the beginning of GT more if Goku didn't get turned into a little kid again. Really cheap way of trying to make it more like DB.
I was always partial to Freeza-saga Vegeta's design, myself.