i have an aversion to 3d printer lines. they make my blood pressure rise and i break out in hives.
To the printers themselves, my only fault with them is that I don't own one! I can't stand the lazy people, on here even, that don't finish their 3D prints and declare themselves a prop builder. Then you STILL have people on here telling them how great it is. No, you just printed something and threw a coat of paint on it!