I worried I lost my 'fun' side too.
It's amazing how we get sidetracked tho - I was quite literally dying...I got pulled back from the brink on that - and I worried I wasn't fun anymore?
We're whatever we want to be - it's always in our control Neo.
Just give yourself time to adjust to your new way of life - get your sea legs as it were...
You'll find you've changed sure - I'm not a party animal anymore but from this distance I know I never liked parties anyway except for the booze.
I'm free to be whatever I want to be now.
You are too mate
D