In reply to abr1966:
Depends what you're looking for, I really enjoy the small lanes of the top half of Anglesey. They feel like little cycle tracks as they have so little traffic, and the occasional rise allows for lovely views. Going to each corner of the Island is a nice challenge, Point Lynas/Llaneilian, Traeth Cymyran, South Stack, Penmon. Also there are some cool coastal bits to see, Porth Cwyfan (church in the sea) and Porth Swtan (Church bay) are nice points of interests.