In terms of money, there are some good opportunities - I'm making around treble what I left a few years ago. A couple of things I found along the way; in terms of 'ephemeral leadership' in the Armed Forces, these are people with months of CLM training at Cranwell / Halton / Shrivenham. In the civilian world you will be working under managers with literally zero days of leadership training, and for some people it clearly shows. In terms of protection under the law and unions, European aviation is a mess and you're not really protected in many organisations despite who or what should be on your side.
Good luck.