I fly both microlights and "proper" aeroplanes and to be honest you can't beat the sheer fun and simplicity of microlight flying.
I think that when learning microlight pilots tend to have a much better feel for the aircraft and are better at looking outside (there are few instruments to become fixated on!).
If you want to go touring especially when the weather is marginal a microlight is no use ( I am sure there will be protestations about the new high speed glass ships, but they all have the same weight problems, it is passengers versus fuel) as they are not that fast and have limited range. They also don't have many instruments (due to the weight) and operate on a permit to fly, which prevents overflight of town etc.
But if money is tight and you want to have fun flying, microlights are unbeatable.