Original manga was great. TV show for said manga was great.
Z was good. TV show was good. Kai is good entry level for newcomers. Some movies are great (Worlds Strongest, Dead Zone, Fusion Reborn) Some are shit (Tree of Might, Return of Cooler, Bio Broly) and Evolution was a stain on anyone who dare watch it.
GT was piss poor over all.
Most of the games suck.
Budikai was awesome.
Don't deny it, you know this to be true.
You don't need to like Z, but don't let the shit of Z discourage you from the original series people, it's a great adventure manga.
And for the sake of it, the only "new" Dragon Ball Z stuff should be a middle story between Z and GT. About Goten and Trunks. That would be rad. It would be all fun and adventure like the first series. Even the HAAAAAAAAAAAAA poweruping stuff was good with Goten and Trunks. Galactic Donuts for EVERYONE.