Hail Thorsteinn!
The SCA is fantastic for activities, but for the fighting... I did at one time informally participate in training activities at the SCA in Victoria/Australia, but the fighting wasn't really for me. The branches are small too sadly.
I don't like the system of getting hit, going on your knees or losing an arm depending on impact, having to philosophically judge how hard you were hit, deal with people who get angry if they think you're cheating them, etc. Some people actually do try to hurt you, which is really scary.
What I prefer is just sparring. Not purposely trying to disable opponents, just going for different spots and being blocked. The armour is a formality for when a shot gets through. But you aren't purposely trying to hit people. It's just more fun when you take that component out. I'd prefer to do mock fighting with live steel, however, such things are difficult to find where I live.
Also call me a bit old fashion, but the formality of the SCA can be a little overbearing. I don't like standing around and shouting 'huzzah!' and bowing to everybody. I do like the idea of it being an authentic experience for everyone and seeing people wearing authentic things and speaking in a non modern way, but the overly formal setting is daunting sometimes.
I don't want to spoil anyone's enthusiasm. I think the SCA is great, but some aspects of it just don't suit me and I am happy so many people do enjoy it.
A persona was something I never developed, as I prefer to be myself. It lightens my duties as actor, moreover, it allows me to play myself but with a knightly voice.