What alignment aids on putters do you guys like? Pat O’Brien from SeeMore says that generally right eye dominant players will focus more on the front of the blade while left eye dominant will focus more on back of blade, and the more you focus on front of blade the more likely you are to aim open, while the more focused you are on the back of the blade the more likely you are to align closed.
So why do you like? A line on the flange? A line on the top of the face? A single dot? Multiple lines? Two-ball? No alignment aids? Contrasting colors? Shape of head itself? Big mallet designs? Simple blades? What helps you the most? How do you know? Have you done any experiments? Have you been fitted? Do you just know?