Smokes anything. I will take steriods, I will take alcohol, but what I will not tolerate is smoking. (Other than hard drugs like cocaine, of course) Yuck. It's like kissing an ashtray. I'd be rude but I'd probably end up gagging naturally. I know you should never say never, but this is one thing I'm absolutely adamant about.
The other thing I probably wouldn't tolerate is a person who doesn't care for themselves. Someone who eats nothing but junk and sits and plays video games all the time. Nope, not gonna happen. You have to care for and love yourself first before you can care for and love another. JMO
And probably shorter than me. I'm 5'3 (4 on a good day!) but there are a few guys who have me beat. Including the 2 that supposedly like me now. No thanks, I just can't do it. It's more of a personal opinion than anything.