I actually find it funny how much hatred these two women have for each other ;P

I haven't noticed much hatred between Regina and Ruby. Definitely Emma because she ruined her happiness by bringing back Marian.

You haven't?! I think it's totally obvious, when they have scenes together. The way Regina insults her or Ruby gives her dirty looks a lot. I think it's hilarious! They have a mega hatred for each other.
"Go take yourself for a walk"- Regina
"I might feel sorry for her if she hadn't tried to hurt us so many times"- Ruby
And like I said, I sometimes notice them giving each other really dirty looks.

^well but that happened in S2 & Ruby may dislike Regina but I don't think Regina dislikes Ruby :p ,anyway I think Emma because of what happened .

Oh no she defo does! Regina will dislike Ruby, if she dislikes her I think. They've hated each other since season 1 and that's never going to change. Plus there's never been any evidence of Regina being "Nice" to Ruby or even attempting to talk to her, so...yeah I think it's pretty clear she hates her anyway ;P
Also she made up with Snow, but not Snow's friends (Ruby, Leroy...) so her opinion of them probably hasn't changed. She's been rude to Granny this season too, so she probably still dislikes Ruby if she dislikes Granny.

Because of the Marion thing. Leroy would be my next choice because he was never willing to give her a chance. And third would be Gold because of season 2.

F*ckin' pixie dust!!!!!!!!!!!!!!!!!!!!!!! :P

The whole Marian thing. ;p

Emma, unfortunately:/ Hopefully not for long!!! Lol I want them to be best friends, this is not cool :P
Blue: I think she would have liked to have a "talk" with her about Tink's wings. xD I don't think Gina actually cares that much but she probably hates her. (like almost everyone else)
Mr Gold: They have a weird relationship. it was bad in Season 2 but they seem friendly now. However, I wonder how Gina will react if she finds out what actually happened to Zelena. Haha I don't think she'd be that surprised, though.
Ruby: I think she dislikes her (which is funny) but doesn't really care.
Leroy: After he freaking accuses her of everything probably not.
Dr Whale: Yeah... her past with him makes their relationship definitely weird.
David: I think he annoys her more than anything but that she doesn't hate him.

Okay... Regina needs some more friends. And Storybrooke more citizens xD

I agree Diamond_Queen ^ Emma and Regina were started to get along....and theeeennnn Marian showed up....

^ugghh yeah, I hate that.

@Thisisme365 & @Diamond_Queen: Hopefully they'll get over it soon!

grumpy never liked her like even when she tried to help