Take home pay for FO is about £2,000 a month after tax (give or take a bit depending if your having a good month on the flight pay or not).
Roster wise I suppose isn't as bad as some airlines, but it aint fantastic either. I seem to get a random mix of really busy weeks, then loads of 2 sector days and standbys rather than a nice stable roster. Rosters only get released 4 weeks ahead and although days off are then fixed, the actual duties that you have been given can get changed and only get confirmed the week before. One good thing as already mentioned is that you are home pretty much every night as there are only a few nightstops here and there.
Aberdeen is what you make it, when I was there there were a lot of guys who were local ish and happy to be there, and then on the other extreeme there were some new FOs who were sent there who hated it and were waiting to get down to their base of choice.
The Embraer can be quite a fun aircraft to fly and there is defintely a lot worse out there technology wise! The only thing I really wish for in bumpy, unstable conditions is an autothrottle. You quickly get used to only reading a couple of lines of the newspaper or having one mouthfull of your scoff at a time then looking up quickly at the IAS then back down again to make sure you don't overspeed!