Lot of good ideas and comments in the replies above. A few comments of my own:
- Certainly natural talent helps, the ability to visualize the table, position routes, etc. The top players have developed their game allowing them to understand and repeat patterns to get from ball to ball in the most optimal way possible playing for the largest area possible. And when they do have to "come" with a shot, they fire it in like it's practice and with confidence
- A lot of regional players can pocket balls well, or have great cueball control, or can bank well, kick well, break well, etc. A top player or pro needs to really have all of these skills at a fairly high level. And they tend to be more consistent at all facets of the game just through the hours they put in, the type and constant level of competition they play against, etc.
- Consistency is HUGE! Look at the Accustats ratings - almost all of the time, the player with the higher rating wins the match, barring weird rolls etc. I have an older match at home where one player shot .913 and the other shot .912 (both excellent!) and the score was 13-11. It's so consistent it's predicable. They make less mistakes in general (but they do make mistakes) in all areas of the game (shots missed, position missed, safeties, etc.) and rebound better by not compounding one mistake with another or by dwelling on previous mistakes
For myself, I've been putting a lot of time into the game, if nothing more than just for personal satisfaction, at my age (41) I don't have any aspirations of making the pro tour and even if I were good enough (which I'm not), the money is not an incentive to quit the day job. But I do want to perform better in the local and regional tourneys, and finishing deep or snapping one off once in while is nice.
So aside from general learning and emphasizing the good parts of my game while working on the bad, I've just really been working on repetition and consistency. So when I have that 30 degree angle simple cut shot and I have to go 2 rails for shape, I make it 5% or 10% more now then I did (or miss it less, however you want to look at it) and feel like I've seen it hundreds of times before breeding confidence etc. Increased "alone" table time, doing standard and ghost/run-out drills, and trying to playing better competition is all part of the plan. If I think about the Accustats-style ratings, and I can raise my own personal rating 5% - 10%, then I know I'm improving and becoming more consistent. Wish I was diligent enough to actually rate my matches over time to track progress - hey, there's an idea...
Scott