Hell, I can't even play the same line two weeks in a row in my Saturday or Sunday leagues! I never know what kind of shot I'll be seeing those nights. We get the beat-up leftovers from leagues that bowl earlier in the day. Some nights they're dry everywhere, some nights the backends are slick as snot. I average 10-15 pins lower in those leagues than I do on a clean house shot pretty much anywhere.
But you should never lock yourself into playing one line no matter what. Even night to night variance in weather, how well they stripped the lanes, who is on your pair, etc. can change how you should be playing the lanes. Find the friction, find the right breakpoint for carry, and make your ball choice based on how you expect the lanes to change and what gives you the best combination of carry and area to miss and still get to the pocket.
