Where I live, you assume everyone you meet is religious, anyone who limited themselves to dating atheists would find it pretty difficult. The word atheist also has strong negative connotations, so I tend to say that 'I'm not really religious' if someone asks. Religion is something that can't be ignored though in the long term.
As for serious relationships, the question is really how religious they are, what their religion is, and their attitude to my lack of religion.
Mixed faith marriages are not allowed here, so both people need to be of the same religion. I have no problem, in theory, converting to any faith for the purpose of marriage as long as it is understood that I am doing this purely for legal reasons and I don't actually believe in it at all. If they expected me to become religious then I would not agree.
Another major issue is children. I know people who have broken off engagements because they couldn't agree about their future child's religious education. These people were very anti-theist though and weren't willing to compromise.
This is the thing that causes me the most difficulties though. I wouldn't mind my wife raising the child in her faith, but I would like them to have a rounded understanding of belief and lack thereof. There are also limits to the kind of levels of religiosity that I could tolerate.
People I have dated tend to be Muslim or Christian (both Protestant and Catholic), and I have to admit I would have less problem with Christianity, although some of the Protestants here are a bit too 'evangelical' for my liking. Would be most comfortable with a Buddhist, but they're like 2% here so it's unlikely.
Ultimately, if I was in love, there would have to be some pretty serious differences before religion became a relationship breaker for me. My lack of religion is the thing that is likelier to be problematic in the long term.
I appreciate your honesty, as everyone's here as well.
I think it's easy to tell one's self that 'it depends on how religious the person is,' when it comes to an atheist thinking about dating someone who is religious. Even if someone is nominally religious, if the relationship takes a serious turn, that is typically when the religious person starts asserting their faith views. About four years ago, I left Christianity. And by that I mean, I was officially finished with the entire belief system. For about two years, I felt a sense of renewed freedom and joy having left Christianity, but wouldn't say then that I identified as an atheist. I was dating theists at the time, and then one day, I felt like the path was just leading in a natural way, to atheism. I've always had atheists as friends more so than religious people, and being introduced to single men who are atheists hasn't been an issue, really. I tend to know ''going in to'' the dating experience with some guys, that they are atheists. Most are life long atheists, and never had to deal with deconversion. But, over the past say 15 months or so, I was struggling to 'make sense' of atheism....and felt like I was missing something. After exploring different faiths, I've come back to the same point...and that is atheism. I share that because when you have worked hard on escaping a delusion, you don't want to give your heart to someone who is lost in that same delusion that you left. And there are a lot of Christians out there, who don't really like what their faith teaches, and try to twist and turn the faith to mean something it doesn't...yet still call themselves 'Christian.' I just find the whole thing entirely too confusing to be bothered with, anymore...and such people will confuse you if you let them into your personal life. I don't want to take a fine tooth comb and go through the Bible, in hopes that a Christian zealot enlightens me. I wasn't really like that as a Christian, but there are many who are not content living their faith, but suggest to others to join in with them. That is something that dating strictly atheists, will eliminate from my life.
Your last line ...you say ''pretty serious differences'' before religion became a relationship breaker...but, to me, a religious person whom I'm in love with, trying to convert me ...would be pretty serious. I think people underestimate how not so trivial it really is.
You bring up a good point about child raising. I don't plan on marrying or having kids, but your point is very valid...that is often when a couple finds out...''oops, this isn't going to work'' If only they had married people who shared in their beliefs...they would have avoided that.
Thanks for sharing this here.