I think both AMD and Nvidia's drivers are good and bad for various reasons.
Nvidia:
+ Simple.
+ Works.
- No overclocking / tuning options.
- 13 menus, only about 2 are used for anything these days.
- "3D Settings" menu filled with a million options, the rest of the menus are basically empty.
- Menus all crammed onto the left, with huge amounts of unused space on the right.
- (Subjective) Looks like garbage.
- GeForce Experience needs an online login (and is pretty useless, imo).
AMD:
+ Looks modern.
+ The tuning tool / Wattmam works great.
- Menu structure isn't the most logical with lots of similar options scattered in different menus.
- Some menus are a bit cluttered.
- Online stuff (ads).
I have gripes against both, but if I had to pick, I'd give the point to AMD, if not for anything else, then at least for the overclocking tool.
As for Afterburner, I've never really liked it, nor do I like the idea that I need a 3rd party tuning tool because the GPU driver doesn't have one. The best monitoring tool will always be Task Manager + GPU-Z (and HWinfo in extreme cases) on a 7" secondary display.