Two people I know well

I'm going to describe my best friend,roberto, and my brother, cristian.
Roberto is sixteen. We met the last year. He's tall and he's got short fair hair and brown eyes. He's very funny, generous and very good person. The best thing about him is, he's always to my side. The only bad thing about him is, he's lazy.
Cristian is seventeen. He's my brother. He's tall and he's got short dark hair and brown eyes. He's a bit different from Roberto. He's serious but simultaneously funny. The best thing about him is, he help me a lot of times. The only bad thing about him is, he's impatient.