More jobs & money in fixed wing
The Forces have a cheap route to fixed wing jobs, the RAF has a number of flying clubs offering cheap flying for ALL service personel.
A lot of rotary wing guys are getting the fixed wing time at flying clubs, I can think of at least two ex-crewmen who are now at the sharp end of jet airliners.
The requirment in terms of hours is to top your fixed wing time up to 150 hours (all your service fixed wing time counts) and then you can take the EASA exams and flight test.
Rotary jobs don't usualy pay as well as the airlines but I should think that civil SAR or air ambulance would be very rewarding in other ways.