When starting out a campaign or with low level characters, I carry a wad of 3x5 index cards with me. These are replacement characters. When a character dies, I just whip on of these bad boys out and kick him to the table. I remember a couple of years ago I kept wishing I could go through several characters to get one on the index card because he had such high stats. I did.
He died in his first combat.
I don't carry the index cards to the game now since I my character reached 6th level a bit ago and his chances of dying have diminished - though not by much apparently. He got knocked down to two hit points the last night. I was one boulder throw away from being killed. Had he died, I would have had a new character whipped out in minutes and went roaring back with renewed vigor. I know I would. I have literally lost many hundreds of characters.
So, I really don't get the depression (that's too strong a word) associated with character loss or, you know that blah feeling, giving up the game feeling etc. I don't the emotional investment thing. Maybe I am psychopath.
I know, its like milk. Don't cry over spilled milk. You know, you can always go to the store and get more. Hmm, but what if it were beer?
Thinking on it, I'll go with the psychopath.
Not this kind
Maybe this kind