Seniority really doesn't mean much when the schedule you're gonna be on is 7/7 for quite a few years. Mathematically, you're working a lot more days per month/year at a fractional than you are at the big 3. Hotel/FBO reserve is the fractional version of short/long reserve at a major, only worse. The only way it's worse at a major is airport ready reserve, which I don't think they do anymore given the new contracts. You're also not gonna make much at a fractional, compared to a major, cause it's not even close. However, given your age, maybe fractional is better since you'll be able to work a few more years past 65 (or 67) if that's whatyou wanna do.