Tip diameter has a lot to do with the size of your fingers! If you have large hands then a larger diameter is going to "probably" work better. It is going to give tighter control on your bridge. If that makes sense! I don't claim to be an expert just going on my 20 years of pool playing experience! Been playing pool since I was 19, I am now almost 42. I learned how to play pool the best way. Self taught and alot of watching and practice, practice, practice. Pool is not just a game it is a state of mind! If you miss a shot forget about it and focus on your next opportunity! Short term memory loss goes a long way in this game. Sorry to go off on a tangent!