I try to find the line, in practice, that will allow for the most margin of error on my part. I am not perfect and still make mistakes, but if I have found a line that will allow me to make a mistake in and hold, or out and still carry, that is the line that i will play. I do prefer to have that line be different than the bowlers on the other team, then my line won't break down as quickly. I also may try to play a different line if 4 or more bowlers on the other team are playing the same line, as to avoid major breakdowns / adjustments. So, I do & I don't.
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Bowling is more fun when you only have to throw 1 ball..
........F*#k the 10 pin!!!!!!