It seems like people are always stereotyping SJs as being sticks in the mud, i.e. having a certain way they think and do things that they never divert from, and that they look down on people who think/act differently. But with two of the INTPs I know, it seems as if they're more like that than the SJs I know.
1. With my (female) INTP friend and ESFJ friend, on a road trip.
INTP: *makes a very dry, teasing joke*
Me and ESFJ: *not laughing and thinking the INTP is serious, and being mean to us*
INTP: What's wrong with you? That's like the fifteenth funny joke you haven't appreciated in the past two days! You people have no sense of humor.
^She was serious/frustrated, and not being ironic. I mention this example because many/most non-INTPs I know will adjust their style of humor based on the audience, and this particular INTP stuck with the one style the entire time, despite no one laughing.
2. My INTP dad, who never goes to church (where my mom and I are in the choir) on Easter even though he's religious, talking with the older sister of the autistic man he takes care of every Sunday morning.
Sister: You know, since it's Easter, why don't you take the morning off? You can go to the Easter service.
Dad: Uh... *freezes up*
Sister: It's no problem. You can be with your family for more of the day.
Dad: Um... *still frozen up a bit* no thank you.
Sister: Really, it's no problem. Go ahead.
Dad: Really, no thank you.
Sister: You could take my brother with you.
Dad: I'll take your brother... but it won't be to church. It'll be to do what we usually do.
He made all these excuses to me about that interaction, like how he doesn't know how all the ceremonial stuff works (the church in question is Episcopal), but even he recognized that it was REALLY because he's a self-described "stick in the mud" (which is where I got the thread title from), and that even though he doesn't really have an Easter tradition (more like a Sunday Routine), he's uncomfortable making a new one.
I'm not dissing INTPs with this thread - after all, I love you guys, and I love my INTP dad and my INTP friends. It's just that these small pieces of evidence are so contrary to the stereotypes that I've heard that I felt the need to verify whether these two INTPs aren't just exceptions to some general rule. And who better to ask than the Ti/Ne folks - the masters of objectivity!