Yeah I think the slight fret rattle is a nice thing about finger style, although when playing mellow stuff I can control it a fair bit.
Best advice I could give is try not to pull the strings too much when you hit them, if you play hard you end up pulling the stings back and causing them to slap back against the neck, when I'm playing mellow stuff it feels to me more like I'm brushing OVER the stings rather then through them.
I've never been taught any technique properly, so to me it's pretty instinctive, so that's all I can offer really. Although the stamina is difficult, I found pick playing to be a much hard technique to get to grips with (ignore the pun

) after playing soley with my fingers for 2 years.