Eagle is what you make of it. There are ways to take advantage of the system if you want to. If you live in base being on the bottom of the reserve list can still be managable. Unlike most places reserves can pick up open time. So you can drop two days of reserve and then turn around and pick up a 7-8 hour day trip on one of the days you dropped. On reserve you make 3:54 per day so if you drop two days and pick up a trip worth 7:48 you get one more day off and don't lose any pay. Do that four times a month and you have gone up to 15 days off, converted 4 days that you were on reserve to a schedule you know about in advance and are left with 11 days of reserve. Some guys who live on sabre have been known to trade drop and pickup to the point where they basically made their own line, and these were guys on the bottom third of the reserve list.
When profering for trips the trick is to get a trip with an 8 hour flying day on the last day or a late return on the last day. Profering for a trip that ends at 7 or 8 in the morning is asking to get extended. Profering for a trip that gets done late or has 3-5 legs the last day will more than likely have you getting released once you are finished. If you live locally and want to just do turns DO NOT proffer for a 10:00am MKE turn out of ORD. I know someone who did that and that turn became a 5 day trip.
Also don't forget if you are extended over and over and get Fatigued, Eagle has a no fault fatigue policy. You will not lose pay over calling in fatigued. I have called in 5 times and havn't lost a penny.