Mikeo is obviously correct, but imho you have to ask yourself...
- Do I want to fly for fun?
- Do I want to gain meaningful flying experience?
- Do I want to be able to travel by air in my own aircraft?
- Do I want to hourbuild for a commercial license?
Only the last question necessarily requires something that isn't a microlight.
One or two useful links...
List of all PFA approved types (mostly homebuilts)
List of BMAA approved homebuilts
List of all BMAA approved types (mostly factory built or vintage)
US based bulletin board for homebuilders
P
N.B. Bogeyman - what is it you've built?