I remember when I was younger, my nick was always Ash, because it's the same sound as H in french, which is the first letter of my name. Yes, at that time I was already narcissistic <3. And sometimes I couldn't choose this one, so I took Ashxelor, don't remember why (as on ac forum).
One day I thought it'd be cool to choose only flower nicknames, but only did once xD. 'Cause I prefer flowers more than guns. It kills slower.
Baruch is the name of an angel in a book I really liked when I was young. Ah yeah the name in german/english is His Dark Materials :)