For my own curiosity

I'm not vegan, but it's a dealbreaker for me to date a vegan. It's also a dealbreaker dating someone who doesn't like cheese 😅. My reasoning is if I'm going to spend my life with someone, that means deciding what to eat for dinner for the rest of our lives, what restaurants to go on for dates, etc. It's just too much hassle needing to avoid certain ingredients in meals or needing to make two separate meals. I'm also a foodie, so I love being able to experience different cuisines with my partner. If our food tastes are too different, it's hard to share that same connection.

With that being said, different diets aren't a dealbreaker for everyone. I just think it's more important than most people give it credit for.

Well, I think eating/food is a huge thing to watch out for. After all, we eat to sustain ourselves, and if that aspect of our lives is compromised because someone else has a totally different routine on that, wouldn't it be dreadful every time you wanted to cook something?

That's truly up to each individual.

I've followed a variety of diets etc throughout my life.. and sometimes I've been of the position it did matter, other times no. even the same diet and my position changed. it depends on your and their personalities and preferences.

For me smoking, drugs and alcohol are big lifestyle factors. And just all round how much are they taking care of themselves, how reckless are they being.

who they surround themselves with and what they do in their leisure time.

the filter is very simple: is it destructive or does it promote positive things? positive could be personal growth, or genuine relaxation. all ting sin moderation. And what is their attitude.

For example let's look at the vegan example. 2 people could be vegan for for very different reasons and they need to not be at odds with one another.

As I get older I 'compromise' far less on lifestyle factors b/c you need to be able to harmonise and I only want ppl around me who are a good influence on me.

I am vegan; my husband isn't. It wasn't a deal breaker since he's respectful, he eats anything I make and most importantly is very good at making vegan dishes. 😋 I do think it's important though to find someone who does AT LEAST that, if they won't actually share your diet.

Actually I think I'm the rare exception. In most cases I'd push vegan women (or whatever your diet/lifestyle is) to only accept men who do the same because most men are not as gracious, kind and accommodating as my husband; far too many of them will make fun of it not trying to sabotage your way of doing things. Maybe not most but enough. (It really depends on where you're from; veganism and acceptance of it in men is a lot less common in certain parts of the world than others. And I assume you're in the West where most people enjoy cheese and meat.)

Also not vegan, but I am substance-free (no alcohol, tobacco, smoking of any kind, nothing that can inebriated me outside of TEMPORARY medical reasons--i.e. no marijuana/THC) and THAT is a deal breaker for me. I have only dated non-substance free people in the past, because I honestly didn't think many of them exist, but I will never do it again. Makes things easier because it greatly narrows down my options. I found out a (now x) boyfriend was smoking weed behind my back once and it felt just as betraying as being cheated on. I can't deal with the anxiety. That's also how I realized the person needs to already be substance free for their own reasons, because they'll resent me after a while for not engaging in it.

I canNOT be with someone who believes in Yahweh/Jehovah/God/Jesus Christ/Allah/Mohamed in even the most loose, mildest sense. I find it archaic and weak-minded. I don't mean to offend anyone on here who does.

I just truly don't respect that belief at its core and no matter how good of a person the believer is, you can't convince me that belief doesn't influence every aspect of their life, even if they're not aware of it...And if it DOESN'T influence every aspect of their life, then they're contradicting their own belief and I don't want to be with someone like that, no matter how benevolent.

Other more standard deal breakers I suppose are cheating, criminal record, no postsecondary education, manipulative, narcissistic, etc.

It's good to have lots of deal breakers because it means you'll endure less drama and pain. I have even more dealbreakers for men than I do for women because despite what men want you to think, there is no nuance to their bullshit, they're just lying.

Anyway, like another commenter said, it's a very personal choice about what you consider dealbreakers, but just remember you owe NO ONE a "justifiable" reason for them nor a chance for them to change your mind on it. Your boundaries are your boundaries and don't have to be negotiable. If they don't like that, then they're not the one for you.

Hope this helps!