Pipe Clenching

Do y'all clench all of your pipes? Does it just depend on how it feels if you clench a specific pipe or not?

I'm wanting to buy a new Peterson and I'm unsure of which shape I want and since I like a hands free experience sometimes, I'm trying to suss out which shapes might be suitable for clenching or not.

Side note: I currently have my eye on the 127 shape (Bent Dublin/Calabash), does anyone have experience with this shape? I've heard from one guy that it gurgles like a mofo and is a fussy pipe.

Thanks!