Analyzing conflict between INTJ and ISFJ. Posted with permission.
You can easily change an INTJ's mind if you provide relevant new information.
As an INTJ, I don't think I'm picky so much as cautious when it comes to choosing friends.
Choose your romantic partner via face to face interaction, not just from a personality test.
Other characteristics are more important for friendship than letter-types.
Links to posts and articles on INTJ Myers-Briggs Personality Type.
Myers-Briggs Personality Type can offer deep insight and understanding of self and others re drives and motivation.