Will i enjoy magic kingdom? (Florida)?

I am 13. I am not crazy about disney but but my 18yr old sister is (especially winnie the pooh). We were originally going to epcot (we may still be) but now my mum and sister want to go to magic kingdom.I was really excited about going on test track and Soarin' etc. Will i be missing much? Are there any similar rides in magic kingdom? Which will i enjoy and what are your favourite rides? We can only do one of the parks but my sister is saying i am selfish because i'm not letting her go to magic kingdom. What do you think? Which will enjoy most? Thanks in advance :)