Well, there are only so many ways to flip a rider upside-down. I think between Arrow, B&M, and Intamin, we have already exhausted the number of ways to go through an inversion.
As far as the pattern goes, usually the first drop is first, then a series of "big" inversions (vertical loops, dive loops, incline loops, immelmann, zero-G roll) because these elements require speed to get through them. After a mid-course block, you have slower speeds, requiring the "small" inversions (corkscrews, cobra roll, batwing). That's just the way physcics work, on a coaster where loops are the main attraction.
That is why "too many loops" can get boaring and I lose interest. I have no enthusiasm in a park breaking the number-of-inversions record. More than 5 is simply too many IMO, unless ALL of the inversions are somehow different from each other. Viper @ SFMM, 3 vertical loops in a row, talk about uninspired.
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Gotta ride 'em all!