Is being 'hard to read' a bad thing?

Hard to read in a relationship is possibly bad. Hard to read normally is usually good.

I'd probably agree with this. Whenever a guy has said I'm hard to read it's usually because they want to 'read' me. It's the kind of 'ah don't you wish you knew what your crush was thinking', it's frustrating not being able to... But it does add a bit of depth.

If someone's struggling so much to read someone though I guess they might feel like it's more hassle than worth but ask him is it a bad thing and what can you do to change it if it is?

Thanks everyone for their responses!

Yeah it's odd, because I believe I am an expressive and emotional and I tell people what's going on in my life and when I'm upset. So it's just odd to hear him say that, and then for my friends to say the same thing. I don't feel like I'm a fickle or unattentive person, I dunno. I don't know if I should see it as a failing on my part, I just assumed I was an open and approachable person. Maybe not.. oopsie.