Besides, my favorite idea from it is secret coded bidding, but the game doesn't really support actual secret codes without falling apart past low-level play (they'd quickly become entirely opaque and extremely specific, making the whole thing kinda pointless), so they're not allowed, and leagues often outlaw most of the interesting things you could do with bidding (heavy jump-bidding bid systems, for instance) in order to keep the game from collapsing and/or to keep the people who want it to run just a certain way without any surprises or hiccups happy.

I eagerly await my discovery of a card game that keeps the parts of bridge I want to like, without requiring a ton of extra restrictions that suck the fun (for me) out of it in order to keep the game working properly. It may be that no such game is possible, but I hope it is.