I imagine this can be awkward for INTPs. I often speak in more of a monotone than the average person, unless I'm feeling unusually enthusiastic about something; more animated in general; or just on a roll with expressing thoughts out loud.
It can take a while to build up a good feel for...
Stolen from the INFJ thread, and yes it's tongue and cheek but also potentially hilarious and I'm giggling like a 12 year old while hitting the submit button.
This will either get 20k views or buried within an hour.
You go to Wikipedia to look up one thing and end up spending hours on the site reading.
You would download the Internet into your mind if you could.
You know more inside your head than you do on the outside.
You have a great idea, but you'll do it tomorrow.