Samsa, my usual nickname, came from the Franz Kafka novella
"The Metamorphosis", where a man by the name of Gregor Samsa wakes up one morning as a monstrous vermin. I've been using the name since I was 17.
Samsara, aside from being two letters off my usual name, is a cycle of life, death and reincarnation, the "wheel of existence". It's a negative thing in Buddhism, akin to living life after life with no direction or purpose. However, since I'm a nerd and not a Buddhist, I took the name from the Shin Megami Tensei series, where samsara appears in a number of games in different forms: The one I used in particular is the ultimate light spell in Persona 3 and 4, unique to my favorite demon in the series,
Daisoujou. Since Persona 4 had been released a couple months before I signed up, it was still fresh on my mind, so I signed up as Samsara here.
that, and Samsara sounded more feminine, since I was going through a gender identity crisis at the time