Dragon Ball GT was, um, how can I put this...... Interesting. It did have some interesting ideas atleast. Super Saiyen 4 was a really cool design and the seven dragons were a really interesting choice for the last villians.
That aside, it felt like a bunch of the filler arcs from Z smashed into one full series (and the filler arcs in Z were horrible.), it felt like it was trying to mix the other two series charm into one saga and that didn't work and it basically gave a big middle finger to all of the side characters, and fans of said side characters, who weren't Saiyens.
Not a fan but hell, to each his own.