Codfather--
Here is my experience at Southwest so far. No emotion. Take it FWIW. I know absolutely nothing about Delta.
Hired in 2000. Off reserve in 3 months. Every hard line since has had at least 17 days off (except February). 18 day off lines are the norm at the 3 year point.
I fly PM trips only. Lines are either AM or PM. It's easy on your body clock.
I commute. It's a no brainer. 12 flights a day to my base on SWA.
I don't fly extra and made $100k+ for my last 4 years as F/O, $120k the last two years.
I block about 720-750 hours a year.
I upgraded to captain in about 7 years and held a line in BWI first month after upgrade.
SWA is very politically correct. It's a big corporation.
1% of pilots are flaming a**holes. 1% are just ok. The rest are outstanding.
Facilities (pilot lounge etc.) are clean and new.
Going to work is not a drag. I show up, go home and forget about it.
I don't know if that helps but there it is. PM me if you want more.
Take care,
S.B.