So i saw a good roleplay called felix the peaceful monk or something and i'ts so peaceful just going round using calm spells on everything. How far could someone go with this?
And do calm spells work on dragons?
I've seen that video series as well, and liked it very much. But I wondered the same thing so I tried a pacifist character - and found out quickly that the Calm spell fails when you start encountering higher level opponents. Even when you start running into opponents that you assume are fairly mundane (tougher Bandits, for example, like Bandit Outlaw, Bandit Highwayman, etc), the spell doesn't work. The same holds true for Frenzy and Fear spells.
What you really need to do is invest heavily in the Illusion skill tree, and grab all the perks that will help boost the effectiveness of the spell: Animage, Kindred Mage, Hypnotic Gaze, etc. Eventually (?) the spells will affect higher level creatures/people, but to be honest, I ran out of patience and never finished the character build, so I'm not sure of the exact procedure to make all of this work effectively.
Also, I died. A lot. So, that kinda poured water on that fire, so to speak.