Which do you prefer? Bowling on the fresh or bowling on the burn? If you're unfamiliar with the terms, "the fresh" refers to bowling on a freshly oiled lane. "The burn" refers to bowling on a lane that has already been used, and thus the oil has been "burned" from its original condition.
The fresh is nice because you can go in with an idea of what you want to do, then play the lanes the way you want. The burn usually requires you to play the lanes the way they'll let you and has very little to do with what you want.
Some bowlers relish the burn just for that reason. The most versatile bowlers can often separate themselves from the pack by adapting to the burn. Which type are you? Do you like the fresh, or do you like the burn?