PSA is like working for two different airlines. PSA will probably be the longest time on reserve, as we have about 4x as many reserves as any airline. The reserve rules aren't great; you'll rarely have more than 11 days off and typically block about 40 hours a month, even though you're working most days. They just consist of a lot of hot reserve and dead heads.
However, nothing beats PSA once you are round one. You can pick and choose your schedule and trips at will. The only requirement is that you credit a minimum of 65 hours. You won't get round one until you're about 50% seniority in your base and seat, though.
Then there is senior manning. Once you get close to 1,000 you will be involuntarily upgraded and moved to the base you can hold. Thanks to a shady MEC years ago, this is all considered 'voluntary' so the company will not pay relocation reimbursement, commuter hotels, positive space, nothing. Also, you'll be back on reserve as a CA and not be able to pick your schedule again.