Your cue should fit you and your style of play.
A cue's length and balance should be fitted to your stance and stroke while bending over the table and using your standard bridge length and grip hand placement.
I use about a 10" bridge and top of my grip hand is about 3" down from the top of the wrap. That is where most cues feel balanced to me.
Using a longer cue means I have to hold the cue further back for the same balance which makes my bridge longer.
I don't like having too long a bridge or having a lot of extra cue extended in the rear.
I only use extensions for a long shot I can't reach.
