My partner and I are very close. I share almost everything with him (unless I am really embarrassed about something or worried that I will inconvenience him, hangups of mine that I'm working on). So I'm very open. He is too about daily stuff, but reserved about his feelings. He is with everyone though, and less so with me.
I wouldn't say he is critical, judgmental or demeaning (though my ex was. He was very logical and dismissive. We argued often). He is practical, which sometimes means shooting me down a peg when I get my hopes up about things I have little chance of getting. But I know that his comments come from a place of caring and concern, and not of dismissal. He just doesn't want me to get disappointed. He is very kind and sympathetic towards me.
We balance out well because I need to talk and vent about things, and he is great about that. He doesn't only treat my issue as a problem to solve (as my ex did), but he also really listens.