It's common courtesy to hold the door open for someone who is coming in behind you. So I do that. I don't know if by opening doors you mean running ahead to open a door for someone else. If I'm the first one there, I'll open the door and keep it open. If someone has their arms full, I'll go ahead and open the door for them. That's the same as if they're pushing something very large as well, like a stroller, row of music stands, or bicycle. It's hard to reach the door and then guide your large object through- you'd have to back into the door to open it, right? So then I open it and hold it open because I have my hands free and it makes it easier for them. 

I do it for people of both genders. Gender isn't a thing I consider when holding the door open. I consider age and physical disability more, because sometimes the very old or people with physical disabilities may need help with opening doors because walking is a challenge enough for them. I've made a couple people angry, I think, but they've been very isolated experiences. Most people are happy because I didn't shut the door in their face or let them fend for themselves while pushing a giant row of music stands.

I don't thin it matters. Let guys open the door for me( though I don't think anybody will)) I don't care. But that is just my opinon. 

I think that guys should open doors for girls - but vice versa. I admit, when a guy holds a door for me on his own, I look at him and have a higher opinion of him - it isn't often I come across that, which I consider gentlemanly (especially when I am holding or am about to hold the door for him.). I used to feel offended at the suggestionn that guys should hold the door for girls, (because I can hold a door myself, thank you very much) but a teacher put it one way recently, and I'm starting to think about this. She said, "Girls, don't take this as 'Oh, I can't possibly hold a door for my self because I'm a girl' or get offended. Think of it as them showing respect to you."

In short, I think that you should hold doors open for others whenever possible, but I do admit, I think of it a sign of a gentleman when a guy holds a door for a girl. You can rightly guess that I was brought up in the South.

Another southerner! Yee haw, ya'll!