Leigh Woods isn’t as good as it used to be – one big hillside that had some good off piste in it was entirely wiped out a few years ago as they logged the whole thing with a plan to replant with native species. I haven’t really noticed new trees yet several years later but I haven’t looked that hard.
There is still some off piste if you look for it – although quite a bit of it is frowned upon these days. Hard to explain where it all is tbh – ideally you need someone to show you round.
AC has had quite a bit of work done on it by volunteers led by some of the pedal progression folks. Lots of it is now flowier – all berms and rollers. It’s ok for a quick blast.
LW official trail has been neglected for a long time – it’s a bit cut up but still ok.
50 acre is a short lap between LW and AC – it’s left more natural – it’s very rooty and pedally.
Bourton Combe is more fun tbh – it’s up the Long Ashton bypass near Flax Bourton (tucked next to a quarry). There are 2 bridleways through it and all the trails are unofficial. But they’re pretty fun for a quick blast.
Belmont hill is all about big jumps / gaps. I haven’t been there this year as it as a bit above my pay grade.