well there are differences between 3d printing issues and 3d PRINTER issues.
everyone has the former, it's mainly a matter of experience and lateral thinking - but with a good machine you don't have to have the latter.

I don't think I've had many 3d printer issues. Certainly had none with my he3d k200 delta and replicator clones are pretty much bombproof.
The ctc i3, yeah - but you expect that when you deliberately buy the cheapest machine on the market
The monoprice mini delta, well all my issues with that may have been of my own making.
Had a rejigger couple days ago and put the extruder back to factory spec- so we'll see if it stopd jamming. Kind of weird as normally a narrower tube insert improve4s things.