I used to use protanks, but have switched pretty much exclusively to kayfuns (I use a dripper sometimes, usually just for tasting juice).
The Kayfun gives much better taste than a protank IMO (even a rebuilt protank). The coils are much easier to dry burn and rewick than protank coils are, and when you dry burn a rewick you are pretty much back to fresh and new, whereas a protank coil is never quite as good as new after being cleaned (again, IMO). Additionally, you can dry burn a built coil many many more times than a stock protank coil. I think I'm on my 15th or so dry burn/rewick of my current coil. It's still performing perfectly, so no need to build a new one yet. Eventually mine tend to get. Got spot, and then I will build a new one. Building coils is substantially cheaper than buying, even though protank coils are affordable.
I'm not one who gets into crazy building. I build what I think of as utility coils. Just a standard compressed coil with some Japanese cotton. It takes very little time, and as I said before, lasts a very very long time. So, you don't really have to like to 'tinker' to enjoy a Kayfun. There will be some tinkering as you learn, but once you get it down you don't have to tinker.
All in all, I much prefer the taste and ease of a Kayfun to a protank.