I am a Sagittarius, and I think it fits my personality completely!
I check my horoscope on a daily basis, and it applies 99% of the time! I don't live by my horoscope, but it helps me define what is going on in my life. (I am an extremely analytical person.. haha)
And, as silly as it seems, when I start dating someone new, the first week I make sure to ask them their birthday so I can check our compatibility. I have even stopped seeing a guy one time, because our signs weren't matching up too well.