My first Hermes bags were Birkins (this is now over 10 years ago) and I did not think of a Kelly at that time. Then I bought my first which was a black box 35cm retourne from the boutique in New York when they were still on 57th street, Well that was love! Eleven Kellys later (OMG) I am still in love with the Kelly, Every day, every occasion there is a Kelly style that is right IMO. It can be super casual in clemence in a large size or super formal in exotic in a tiny size, For me the Birkin does not have the same range of adaptibility, it is always a tote bag, just bigger or smaller. And it does not have a shoulder strap, which is the all time clincher for all around ease of use daily. So I love Kelly and I encourage you to discover all her charms too!