As for the Long Haul / Short haul question, don't froget there's the type of flying involved to consider as well. Charter vs scheduled or freight or corporate. You need to sit down to discuss what it would mean to you and your other half (if there is one).
In 5 years since leaving, I've tried long and short haul, pax and freight, glass cockpits and classic jets. Sounds like quite an acheivement in such a short time - it was! I was made redundant from my first job before I had actually left the RAF!
Forget the aircraft type, generally they are all pretty similar. But if you like flying, you will get pretty bored with one or two landings a month.
Personally, found the fatigue too much to cope with on long haul, so the switch to short haul made my life much better, And I've started to enjoy flying again. Talk to guys who have left in similar circumstances to you. That should give you a feel for whether you may like a job.