i've had 4 nethies (still got 2 of them) all quite different.
my first Eli made me fall in love with the breed, he was so loving and snuggly and yet funny with wonderful character.
Maisie was virtually feral! she never stopped, was into everything and was very independant and not very sociable but she was lovely and great to watch!
i still have Buddy and Lula, Bud is chilled, very relaxed and sweet. lula is quiet, nosey and also a sweetie. they are easy to catch if i need to handle them (but try not to unless i have to as they do just tolerate it really!)
i have a mini lop in with them as well, Blousy is bossy, stroppy, hard to get near and rules the roost! i have had 8 rabbits in total and 2 fosters.
i haven't had any major health problems with the nethies but i know they can be prone to dental issues.
like the others say, look into rescues first as they are ready to go. its great you are doing your research and asking the right questions before you decide.
lots of luck, keep us updated and keep asking any questions if you have any.