SkyWest
I bid 35%
As far as vacation goes, if you don't mind keeping a weekends off schedule or don't mind working a lot in one part of the month, you could get huge blocks of days off on both sides of your vacation. I'm talking blocks of 10 days straight on both sides of your 7 day vacation if it falls on the first or last week of the month. That would get you 27 days off in a row. I like to keep a weekends off schedule so I'll usually end up with 10-11 days off with 1 week of vacation.
I almost always get commutable 4 day trips with weekends off. My seniority can't hold the weekday trips that go out to the west coast so I don't bid specifically for those. With PBS put what you want as your first choice but then use the next options (we call them layers) to bid more realistically.
PBS is great when we are properly staffed. People complain when they start getting way more credit than they want or have to work a certain day that they usually can get off.