I am Sheep Dec 79 born and my wife is rooster Jan 82 born

I have my son who is Rabbit born on Feb 2011 and one of baby is expected in Dec end which will be also sheep. I want to know, how will be our life and compatibility between us.

I am very confused to take Chinese calendar as I think that Tiger,snake,Dragon are much better than sheep and Rabbit in every filed.. Like they are much clever and good in fitness in body and in mind. Is this true? Should I believe in this things? possible? is it true that sheep/rabbit never will be defeat to tiger/snake? Or Rabbit/sheep is less clever than Monkey and snake?