IMO the only things that matter from a practicality standpoint on whether a cue is good are:
- Cue (shaft and butt) are straight enough that playability is not affected
- Tip is rounded and chalked (if you chalk before each hit, the tip's ability to retain chalk is moot point)
Beyond that, I believe everything is psychological. I have a friend who is a level 7 in APA 8 ball use my McDermott once because he forgot to bring his Schon. It's an old school Schon that he's owned and used exclusively since as long as I been playing pool with him. Said he couldn't stand how it felt after a couple of practice hits and then proceeded to break and run on me 3 times in a row. It is the poet, not the pen.