I love the classic E.G. Booz "Old Cabin" whiskey bottles, in the shape of an old cabin. Just do an image search for many views of one. This whiskey brand is also thought to be the origin of the word "booze". There are many reproductions, but originals can be found. I love the crazy Old Forester "holiday" bottles from the 1950s.
For whiskey that I can buy now, I'm a fan of the Four Roses bottles. The unpretentious Yellow Label, the nice ovoid Small Batch, and the round-base-to-square pillar shape of the Single Barrel. In scotch, the Balvenie bottle is a great design.
Overall, I'm not a fan of 21st century label design... I prefer the old school looks.
I've been having trouble finding decanters that I like that aren't made of lead crystal. I don't want to be pouring into a decanter only to have to pour back at the end of the night. But most non-leaded glass whiskey decanters aren't really great designs, and most are poorly made.
Short and simple, 4RSmB bottles.
I think the smooth-shouldered Elmer T. Lee bottles have a nice shape although I have not yet handled one. BTAC/ER10 are clean and elegant but too damned tall for a lot of spaces (and boxes). I much prefer the older Weller bottles to the new. The giant mouth and squat design of the OGD 114 is growing on me in a decadent way, and I really like the feel of the High West bottles (though I do not care for the labels). At first I even liked the OFBB bottles, as they make me think of a coveted rum, but once you get 4 or 5 on the shelf their inefficiency is annoying, along with the huge amount of whiskey surface area exposed to air after just a few pours.
I have always liked the look and design of the Jefferson's bottles simplistic,elegant and easy to stack deep,which is a big plus.
Well, I can agree on the stack deep part.
The bottle shapes aren't anything to brag about, but I love the labels on the ORVW's, OWA age statement bottles, and CEHT's. My wife, while not a bourbon drinker, is a big fan of the Angel's Envy bottle
That's interesting Gary because the Angel's Envy bottle has always struck me as feminine.
WTKS while not unique in spirits, has always been a sharp looking bottle to me. I hate the Blanton's bottle excluding the horse, but love the contents.