It depends. If I trust someone fully, If I feel safe and comfortable with that person, if that person is understanding enough and I know for sure they won't judge or think different of me, I don't lie and try to hide as less as possible (And I don't mind if if they know about my life)... Now, with strangers, people I don't trust enough, or people who I know would not understand, I tend to hide most of my troubles and the more personal stuff.
Now, about my activity (or lack of it), I don't mind being truthful about it. I see no point in lying to make my life look more "interesting". I don't want people liking me for what I'm not. Also, I am a person, not a movie, a book or a game. I am not here to entertain anyone... so what right do others have to tell if my my life is "fun/interesting" or "boring"? Who says I must be a certain way or have a certain routine in order to be likeable?. I think it's a bit rude and ignorant to label someone as "boring/fun/good/bad/sane/insane/etc." based on something so superficial. Seriously... I'd rather be alone than being with people with such mentality.