I would agree entirely because I recognized this sometime in my early 20s and never looked back. Now I have a very, very select handful of friends that are all incredible people, but can't get along easily with 4 out of 5 people... I think mostly because I'm suspicious of why they're being personable and talking to me right now. Hell, I think Dale Carnagie made me so jaded I can't function in society, but that's mostly on me.