He's a grouchy, pedantic bastard, but somehow manages to pull it off in a way that makes you still like him, no matter what, and nothing's quite as much fun without him. He's great when he's drunk - all the stuff he keeps in his head normally just comes out, and it's great fun. And the next morning, he forgets everything after the second pint. He's always up for any adventure, and he's a superb photographer. He rescues my failed attempts at being handy with powertools. He's really smart and knows a lot of obscure information, but he's humble about it and doesn't wave it in people's faces.
My step-dad is ISTP as well, and he's what's known in the UK as 'the salt of the earth' kind of guy. And he can take apart a car engine and put it back together again, which to me is totally awesome. And he puts up with my mom nagging him all the time, and yet still manages to maintain his dignity and independence where most other guys would've by now become hen-pecked wusses.
So, c'mon people, let's give those ISTP's a bit of love and adoration. They'll probably take it a bit better than the INFP's at least!
*actually I've probably got about 5 or 6, but for convenience let's keep it at 2 for now