There are few people I keep in touch with more than others, but I don't think that's a clique.
Originally Posted by Esoteric Wench
Getting stuck in a rut (aka accepting things as they are so much that they overlook change... even if it's for the better.) ISTPs do what they do. And the do it very well. And that's pretty much all they do. For example, my ISTP has his routine and he sticks to it pretty religiously. It never occurs to him to look at his routine and see if he needs to shake things up a bit.
Living in the moment at the expense of developing any sort of long range plan.