In terms of what game you're rolled for...if you have enough of a life roll to re-deposit when you lose $100, you don't have to be as bank roll nitty as the rest of the thread...The bench marks everyone quotes are so that your risk of ruin is 5% or less as a winning player.
You're probably not a winning player yet, so bank roll mgmt doesn't apply. I would just play at whatever stake you find interesting AND can afford to lose your entire stake.
As for your question, if cash interests you, go with it 100%. It is a better way to make a living at poker and/or earn steady profits playing whenever you want. I prefer MTTs and SNGs because i like the extra meta game that the tournament structure provides, but somedays I wish I was a cash expert instead so I could get up from the pc when I got tired of playing and go outside.