Well, yes and no.

Obviously, the more you try the better you'll get. I also like to fly conservatively, so if I do a "Low, Inverted Pass", it's not EXTREMELY low. I could practise it over and over and get lower and lower, but at what cost? I don't feel the need to get it any better, so I'm not going to risk one of my planes trying.

Next item: How good can you get? This is where genetics comes in. I can draw pictures - my accountant can tell whether or not I should re-mortgage my house.

I can't do that and he can't draw.

I have known fliers who have been at it for 20 years and still need a buddy box. face it, we all have certain levels of abilities. Practicing will make you better, but the extent that YOUR skills can assertain are goverened (At least to some extent) to YOUR abilities.