My first favorite is Sarah Finnegan. What was a shame was how Sarah couldn't get much international experience due to the stupid age limit rule.
Sarah is from the same gym as 2008 Ivana Hong, and 2004 Olympians Courtney McCool and Terin Humphrey. What I like about Sarah is her beam routine and her choreography.
Katelyn trains under Valeri Liukin at WOGA, the same gym of Rebecca Bross, 2008 Olympics Champion Nastia Liukin, and 2004 Olmpic Champion Carly Patterson. What I like about Katelyn is how she is a mix between Carly and Nastia, and I like her beam, if only she would connect her standing arabian into her first layout series then her difficulty value would go up like crazy.
Polina is pretty much a mini Nastia. BOTH Russian and parents trained in gymnastics in the Soviet Union, both are coached by their parents, and both have what the Soviet was known for, artistry in gymnastics.
Amelia is so happy all the time. She's not every powerful on floor, but she is trying to work on all four events.
Lexie is most likely an event specialist due to her vaulting and floor, her floor routine is good but she needs to work on her landings, and change her floor music to something less cheerleading.
Good luck girls, and make Team USA proud!