For me the site is sub-optimal without comment scores.
Part of the usefulness of the site is in presenting what other people think about a particular topic and a quick way to ascertain that is to look at comment scores. Having scores available is like having a digest of opinions, without the scores one has to read a lot more; skimming threads is a lot harder for me now.
I was also one who liked to "upvote a comment if it looks too lowl" and vice-versa which I think gives a better view of things.
Does any one like HN without comment scores?
I don't think it would matter if I had all day to read and digest every comment thread but as I don't it does, it grates with me terribly. For me reading HN now is too much work.
It's also the same with 'famous' posters, they suck up all the attention, partly because of who they are and partly because their score count quickly racks up to the detriment of some of the lesser known peoples comments.
The way it is now I read everything, which is probably giving me a better overview of opinion.