I don't like the half twist or low profile ones very much. They just seem too easy to bump the wrong way and cause a leak. The low profile is obviously the only option in some cases, but if there's clearance I'd choose the lever style.
I'm trying to find some porn filmed by a dog wearing a GoPro. - SharonaZamboni
Hunter, when you get bored, will you put a taco in my elephant's hands for me? - Hat