I have quite a similar background to you... Started flying for a living aged 31 having waited 7 years to get a lucky break (UK financial crash etc). First job was mostly long haul which was great fun but I found it very difficult to get good at it since I didn't fly regularly enough. I've only ever done this job with young kids at home. I do think it's a very different job once you start a family. Your priorities will change and your home life will be fatiguing, let alone spending nights out of bed, early starts etc. Some days I turn up to work and think it's a miracle I'm even there!
I left my long haul job and now work at BA on short haul. I like the pattern of doing 1/2 nights away and having the option of day trips. It suits me (though the constant weekend working less so) but that doesn't mean it'll suit everyone of course. A lot of people thought I was mad when I jacked in the long haul job to go and flog around Europe in a 320, but they tended to be people without kids, who were able to recover from trips exactly as they wanted to at home and spend all day in bed before a night flight etc.
Suppose the point I'm making is it depends what your life plans are. If you're planning a family soon then that may influence your decision.
Good luck with it.