Man, I don't even know where to start...are we talking physical insecurities? Ironically I don't have many on that side, not that I consider myself all that (quite the contrary) but, it's just something that doesn't really stress me...I'm average in all "looks" departments, even though I've been told I'm good-looking.
I would say :
- Social insecurity : not knowing how to really interact in groups. Shyness, lack of self-confidence, you name it
- Pro incompetence : basically all my pro experiences sucked, so at some point you start wondering whether you're even able to function in a pro environment
- Having "missed my calling" : I "lost" about 10 years (ages 15-25) of my life due to seriously struggling emotionnaly and socially, when I first got to Europe. But those happen to be the years one "discovers" himself, builds longer relationships, starts to really live, etc...so I really feel I missed on A LOT and am late