A pet store is a celebration of dogs' existence and an explosion of options. About cats a pet store seems to say 'Here we couldn't think of anything else.' Cats are the Hanukkah of the animal world in this way. They are feted quietly and happily by a minority but there's only so much hoopla applicable to them.
I have no requirements for a style of architecture.
We think of enterprise architecture as the process we use for fully describing and mapping business functionality and business requirements and relating them to information systems requirements.
There is no age height or weight requirement to skate. It is good exercise no matter what your age is. If you want to be competitive most start young. But I practice with many adult competitors.