Completely agree with Mr Smith and davidtaylforth: too many of the custom builders named in this thread appear to have gone straight to the low volume/artisan end of the market, without having accumulated the experience of building lots of frames for lots of different customers. Many those artisan builders seem to spend a lot of their time on functionally useless decorative over-ornamentation of their frames to satisfy silly fads and whims of their own and their customers, who seem to value a frame that photgraphs well more than how it rides.
Pegoretti is famous for his fancy paint jobs, but the difference between him and the UK artisan builders is that the paint jobs are simply the icing on the cake (if you like them) on a frame built by probably the greatest custom steel race frame builder (the man who built Pinarello’s team frames for Indurain and many other top riders in the pro peloton, having himself served his apprenticeship under another italian master framebuilder).
Dave Yates used to run M Steel’s frame building workshop, and has built/supervised the construction of many thousands of frames. Like Pegoretti he was a racer himself, and he also was a mile eating audax rider who has completed Paris-Brest-Paris and London-Edinburgh-London, and that experience has strongly influenced what he recommends and builds.
You go to guys like these and Rourke and Shand for their experience and knowledge of what makes a great bike to ride, not for some fancy pointless decoration which took the builder half a week to make.