Aesthetically, I like squat Bulldogs and Rhodesians. There's something about the visual of the low slung profile that appeals to me; perhaps, it's the Art Deco geometry that
@Chasing Embers mentioned. There's a certain grace to the visual flow of the line that appeals to some of my sensibilities. The squat version also adds to the width of the bowl, so the feel is a bit cooler to the touch. As a side note, I used to adhere to the simplistic division between Bulldog and Rhodesian shapes being defined by the shank shape, but,
@Ag®o makes an interesting argument that it has more to do with the chamber shape required by the shank and how it meets the bowl.
The Savinelli 514 KS shape is a tall Bulldog, and has given me some of my best smokes (I have several because of this), but, that may be due to the greater width and depth of the chamber as compared to other shapes I have.
The few Pots I have, I enjoy because of their chunkiness and chamber size. My leanings toward Authors by Savinelli and Brebbia are for the same reasons. Again, some of the benefit is the thickness of the wood making the pipe feel appreciably cooler in my hand than some of my thinner walled pipes. I'm open to getting more Pots. That said, I have a GBD Ebony Colossus Straight Pot that has one of the larger chambers of all my pipes (1.125" width x 1.75" depth), but, it tends to smoke close to hot because of the size of the ember within the chamber and relative thinness of the walls.
Technique and packing doesn't seem to solve all heat issues with a couple of my pipes; some pipes that just feel warmer because of their geometry and wall thickness (or perhaps, more accurately, their thinness?)