Having tried my first nosewarmer yesterday, I've decided that I don't like short stems for a couple reasons:
Firstly, I like smoke in my mouth but not in my face. A longer stem keeps the bowl away from my nose when I'm clenching a pipe in my mouth but want a breath of fresh air.
Secondly, I get an odd satisfaction from seeing the little curl of smoke that occasionally rises from the bowl. Having a longer stem means I don't have to cross my eyes to watch the show.
And a bonus reason, I have longish hair and I don't like smoking hair.
I also noticed that the nosewarmer smoked significantly hotter than my other pipe but that may have been because it's brand new, or because it was exceptionally hot out yesterday, or any of a dozen other factors. Either way I have a longer bit for it that I'll swap in.
Ivan