First thing that comes to mind is the ease that you were radiating, e.g. when dealing with people, which seemed to come really natural to you. There have been always people around you, everybody "knew" you and vice versa. The "opposite of distanced" describes it quite well I guess.
Then the ability to bring enthusiasm to everything, which brought some instability with it as the other half of the coin. With that maybe a grain of naivity and credulity, but I'm not sure if this was stronger in you than in others of your age.
The above mentioned ease went hand in hand with carelessness, few thoughts about the future, better do something right now. And about do something right now, this has to be mentioned as well. You always had to be doing something. Not in the sense of hyperactivity but just not get bored. On the other hand there was self control, you never have been the guy for excesses of any sort. (at least that I know of
You've been the ever happy and ever nice guy.
At last one thing that I'm aware of myself is, that there is a certain disability or desinterest to understand others deeper than just scratching the surface.