I personally stream for fun, people find me entertaining so I just give it a go every now n then, personally don't stream league, it's pretty much impossible to get noticed while playing league these days cos everybody is doing it.
The main thing about streaming is being entertaining and avoiding large periods of silence, if I wanted to sit and watch random games in silence id use the spectator mode.
Do you feel like you can spend long periods of time essentially talkin to your self etc? Like I stream Pokemon mostly (Speed runs of Yellow) and that requires me to talk to my self for 3 hours in an entertaining manner lol.