<human>: Hi Reddit

I used to have a link to a huge list of I think they were called mental behaviors. Basically it was a list of ways people think and behave and before seeing the list I thought all of these little ways of thinking people had were different. I would dearly love the whole list but there is one I want to know the name of right now.

Basically people have a predisposition to nominate or steer towards a certain product, company, car, food or whatever because of this mental condition (condition makes it sound bad but it's just a way people behave) 

E.G I use utorrent and whenever someone mentions "what torrenter should I use" I am always nomming utorrent I say it's the best etc etc when really it's just an option.

I have a meeting with my boss tomorrow where I am basically going to say we are losing a lot of business because you are stuck / mentally attached to this company because of "X" there is no good reason for it, lots of people behave the same way make a change.

Can you condense the text into a few key points?
<bot>: What is the mental behavior called when you are seemingly like on thing more than another (for no particular reason) just because you are familiar with it or have spent a long time with it.