Compatibility of signs

A friend who studied horoscopes was discusssing with me the compatibility of signs , and he's like gemini and Leo are great together , but gemini needs to be aware of leo's ego and not hurt it or ignore it , and gemini and sagittarius are either a match made in heaven or hell ,but mostly heaven , and he was like they are similiar yet different , that's why Angelina jolie and Brad pitt fit well together .Gemini and scorpio make good friends.Gemini and Aquarius are friends and sometimes more. I asked him about other signs , such as pisces and sagittaruis and he's like they don't go well together , and Leo and scorpio sometimes they are well and sometimes they aren't.Libra and pisces are okay , because libra can tolerate alot of signs . It was a long discussion , but now I start to think of people's horocope sign when I meet them .