Dang, that's one h3!! of a "man cave", but attractive enough not to repel the missus. Like that old Irish Spring soap commercial in which the lass coos, "Manly, yes. But I like it too". Very nice.
My only quibble from an acoustical standpoint is the flat, blank side walls -- first reflections galore. I'd want bookcases or more "stuff" on the walls to absorb and diffuse sound at least between the front speakers and the viewing couch. Pictures alone won't do it.
Well, the long tunnel-like dimensions might be a problem too -- or not. Maybe it only adds a bit of ambience to the sound which can be a good thing. But hey, it makes room for the pool table and bar. Everything's a trade-off in design. Good trade offs IMO.
Otherwise, I share the general admiration! I only hope my room doesn't take 3.5 years to build.