Hi,
I do it because I like the silence. Next I like the kind of understand functionallity.
I don't really need a rebreather. Our lokal lakes are very shallow (< 15msw), dark and cold with nothing in it what needs to dive rebreather (you cant see just some fish and a lot of human rubish) The dives can also done very comfortable with a 80cuf bottle. (around one hour diving, before it should run cold).
Thats the environment in the middle germany
my rebreather friends and I (3 divers) are the lonely seen rebreather divers here in the area.
just my 2 cents
Holger