Okay, I was kinda busy so I'll get my thoughts out on GT and why I like it better than Super.
For Super, I'll say I like a few of the fights better than GT.
For GT, I like the overall story a bit more than Super as far as continuing the Z story goes.
Like what really was Super? Goku getting a hard-on for strong fighters. No real plot, no character development for anyone except maybe Gohan, Krillin and Android 17 but really, who cares?
GT to me was a show that had a great concept, but failed execution.
They could have dragged it for at least 100+ episodes.
A lot of people disliked Goku turning into a kid. I honestly didn't really care, I don't think the show would change my perspective on it whether he was a kid or not. If anything, they could have done something like having another character turned into a kid like Chi Chi, Bulma or Master Roshi. I don't know, just throwing names.
Second mistake was having Pan be on the flight. Really should have been Goten and they could have pushed Goten and Trunks as the top new Z fighters. Vegeta also being a part of it would have been cool too.
Third mistake was rushing everything. Super Android 17 arc could have been at least 15+ episodes but for some reason it was only 6-7?
As for what you could do now that you have finished GT? They have a movie about Goku Jr.
It's not that good, it's super laid back. Almost on a Dragon Ball level laid back. Don't expect anything insane from it if you choose to watch it.
I'd probably say overall it's better to branch off and watch shounen shows other than the Dragon Ball series.
Which still carry the overall same feeling, just different approach, etc.
Yu Yu Hakusho - 112 Episodes and is a classic
Hunter x Hunter 2011 - 148 episodes (Incomplete)
One Piece - 850+ episodes and ongoing (Favorite anime, but might take time to catch up and a lot of commitment.)
Fullmetal Alchemist Brotherhood - 64 episodes
Case Closed - 130 episodes + 6 movies dubbed - 900+ episodes and ongoing (Fun laid back show to watch. Not a show to watch seriously, but just to relax.)