You name it, I've listened to it. I tend to have determined a few ELEMENTS of the music that I like, much much moreso than the specific genre. I've found many people who are very passionate about music are this way. I love music with energy and fire. I love music that takes you on a wild ride where you don't know where you're going next.
By the time a young gymnast turns 5 years old, he or she can master more complex gymnastics skills if regular training and classes have been going on for a few years. Physical maturity, practice and good teaching will allow older children to master impressive gymnastics moves on all the equipment.
It may be possible to excel at gymnastics even if you start as late as 12 years old, but it's better to begin earlier in life if you have the opportunity and access to the facilities. Two years old may be a bit young, as children that age don't have the necessary coordination and attention span. Still, getting them into tumbling at that age can build an interest to go into gymnastics when they're a little older, such as in the 4- to 5-year-old range.