Foster
Flight time depends on many things, the aircraft you fly, where you're stationed, your ability, and attitude to name a few. As far as job happiness, you have good days and not so good days. Army aviation is by no means perfect, but it's not bad either.
There are some similarities that your fixed wing time will help you with, but there are also many differences, just wait until you start trying to find the hover button. Keep up the research, and don't let recruiters talk you into something you don't want to do. Most recruiters aren't too familiar with the Warrant program. I've met people, both Warrants and enlisted who were told they had to do some enlisted time before they could apply for WOCS. As I said before, I'm not familiar with IST's, so I don't know if, or how that would affect how the recruiter works with you.
Regarding overseas assignments, Germany has several aviation units, but some of them may be moving back stateside with the restructuring going on. Other units are in Italy, Korea, Japan, and Honduras. Again, with the restructuring going on, all this may be up in the air. You can go overseas in your first assignment. I went to Korea out of flight school. It's fairly common for quite a few guys to go overseas right out of flight school.
Good luck with everything, and don't hesitate to PM or e-mail me with any questions that may pop up.