I, too, find myself firmly in the NorthShore #6 camp.
I started drinking martinis back in my 20's, and I mean martinis the original way, gin with a hint of dry vermouth, and an olive. My gin was Beefeater back then, and my palate grew weary.
Years passed. I had sworn off martinis. More years passed. I went to a tasting at Sam's of the new NorthShore distillery products. The gin - magnificent, not just juniper, but hints of cardamom and cumin, orange blossom, and a nose that was pure perfume. I bought a bottle, then another, and I started drinking martinis again.
I find that the NorthShore is the perfect gin for my older palate, it has complex, layered flavors, and is smooth enough to drink at minimal dilution. It reminds me of the better white wines that I drink. I won't drink a martini with anything else.
As for cocktails, like a scratch Tom Collins - I won't waste my NorthShore #6 on them, so Beefeater, or even Gordon's goes into the lemon juice.