For me Northern Soul is the only music I like generally. I personally feel the proper classic stuff I grew up with, known and worshipped in the mid 70's has never had much quality added to it. Yeah there's been a few, but percentage wise at least 80 percent of the decent stuff which helped coin the phrase was by then discovered.
The genres of crossover, R&B, doo-wop, popcorn, rare soul are poor cousins of proper Classic Northern soul which eminated mainly from Detroit in 1966-68. Modern Soul which started around 1970 and is generally best split into a seperate room imho.
Soul patches, baggy trousers, sport bags and retro effects are fine if you're into that sort of thing, up to the person. For me though, proper classic Northen Soul should never be tainted by these offshoots if that's the right phrase. Keep 'em seperate, keep the real deal real. Northern Soul was coined by a great man with great musical taste, all again imo.
Best
Dave