Don’t forget that a day trip line gives you a ton of schedule flexibility. You want to trade back back day trips for an easy 2/3/4 day...done. When I commuted to ORD, I had months when I got a 2-day line, and 16+ days off. You know how often I could trade a 2 day for a super easy 3 day in base...more than half the time, and still had 13+ days off for the month.
That being said, seniority is everything in this company...unless you are on RAP/Stby and a pilot junior to you (same STBY/RAP window) gets called for a great trip, and then you get called for something vastly inferior.