Fast & flowing = Llandegla & Afan trails, especially Penhydd. Mix the White & Wall routes for a great circuit. Skyline final descent stonking, just a bit much fireroad along the way.
Brechfa ok, depends when going as it does get rather muddy in places.
Penmachno nice trail, no facilities on site though. Marin is ok, nice final descent, but a bit dull in places.
Machynlleth – bored the hell out of me – one good piece of rocky descent, otherwise unexciting – why drop all the back into town on the road? What a waste of height gain.
Climax trail just down the road is another story, stonking little trail with fast & flowing & technical sections.
Coed-y-Brenin – really like The Beast, although the old Karrimor was longer & tougher! Shame you have to ride the old Red Bull route to do Snap Crackle & Pop. MBR is a good circuit too – not too long & plenty going on. Miss the gully drop on the Beast, but new smooth section is fun.
Cwm Carn is another worthy of mention.