Do you date your own Sun Sign?
I'm a Taurus. I've only dated two Taurus Men. And I'd be very surprised if I ever do it again as there was around 15 years between the two experiences. The second time was in part an experiment to see if time/maturity made a difference. It didn't.
To me, a Taurus man is too possessive, jealous, and prone to outrageous anger. Oh, and highly materialistic, which I'm not. The first, which lasted a couple of years: We were born only 4 days apart, so everything except the Moon was conjunct in our charts anyway. His Moon opposed both of our Suns.
Our relationship was *very* volatile. He stalked me when I was out with my girlfriends. I had to get permission to go out with my best girlfriend from him! And he wanted time, specifics, etc. Then the first thing he'd say to me when I got back was, "Who'd you f*ck?" He may have been a Scorp Moon, but I'm a Moon-Pluto. I wasn't the one who cried when I ended the relationship!
My most fulfilling relationships have been with other Aqua suns. What I enjoy the best is the understanding and comraderie. With my moon/Pluto trine I need someone who truly gets me.
Absolutely not, under any circumstances, would I date another Leo. By definition, Leo's tend to be assertive, outspoken, have dominant personalities, and we want to be in control.
And I have a 1st House Taurus Mars...we'd be like Xerxes vs. The 300 Spartans on Thermopylae.
Guess who's NOT going to be Xerxes? 
Ad Astra - I can see how two Aqua's would work. There isn't as much ego I'd think. You can just be and it's cool as far as the other person is concerned.
IM - And as I can see it working for 2 Aqua's, I can totally see it not working for 2 Leo's. Too much ego! And I can't even imagine the fights for space in front of the mirror before you leave the house, lol!
Dated another Gemini once. It was wonderful... while it lasted. I felt completely understood for the first time ever.
I am currently with another Leo. I tend to gel really well with other Leos and like Leonine traits in others.
Our risings and house placements compliment each other. He is more Virgoan and mutable than me.
We don't need to fight over the mirror. It's big enough for both of us to use at the same time. 
Both of us are super stubborn, so we often enter negotiations.