Afan. As a novice mountain biker used to ploughing through Bristol mud, the trails here were a total revelation. Fast, flowy and you can scare yourself without too much risk of going home on a spine board.
Nant Yr Arian. Epic scenery, kites, great trail with a handbuilt feel, optional natural stuff for the grumpy old men.
Dalbeattie. Just love the way they’ve incorporated the natural rock into the trail, the Slab is still the most awesome thing I’ve ridden on a bike, and the layout is well thought out. More trails should have skills areas near the car park instead of being miles from anywhere.
This list could change on a daily basis, mind.