What everyone else has said plus:
No having the TV/music on at a ridiculously loud volume.
No football!
No cloud of talcum powder all over the bathroom (it really was like walking into a fog which then settled over every available surface).
No being hunted down: as soon as he had finished whatever crap hobby thing he was doing (definitely never housework) he always used to go around shouting "where's mummy?" and I had to immediately stop whatever I was doing and notice him.
No trying to pretend that I did not notice that he could only get semi- erect unless he had taken Viagra, which, of course, I had to pretend I did not know about - at least until he left some on the car seat 
. I can only assume that he neck's it every day with his new bint.
More headspace - just not having to take his whiny me, me, me into account is worth splitting alone.
No more being at the mercy of his moods. If he felt bored or tetchy he'd take it out on me and the DC and wind us up until one of us exploded, whereupon he was, of course, all hurt and reasonable and we were the baddies.
No more trying to convince myself that this time when he said it was over with his latest mistress, it really was true (slaps own forehead for that one - why did I ever do it?).
No having to put up with his shit driving.
No more moving house whenever he got bored! (he has moved twice already in the two years since we split).
No more having to live with someone with no moral compass, just narcissism.
I could go on (and on). Another one who will never, ever live with anon except my DC again.