ha ha! my good man.
Plymouth is probably my go to gin, much from reading up on others but also in comparison with other London Drys. Simple, not too high in proof, stoney... soft... mineraly... I dig it.
Bitters... All that you mention have very different character. Angosotura, the classic... Manhattans.. it is what it is .. Peychaund... for the Sazerac... nothing but.. ah yes...
Orange bitters.. this is where it gets tricky... there are many "orange" bitters out there... Regan's ... can't go wrong... Angostura makes an "orange" bitters also, Fee brothers... okay... Scrappy's orange.. "GREAT" pricey though... if you want orange... start with Regans...
from there... you decide!
For your Plymouth gin... if you dare a pink gin cocktail... Angostura.. there is no substitution...
If you live to see the next morning off the high seas... well that my friend is another question entirely...
Cheers!
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