Oddly enough, when I started off in H, the hype around Birkins eluded me. I wanted a Bolide! But then the Kelly whispered to me... and I ended up with different bags. I went to the botique a lot and realized what colours turned on a happy little light inside me... and Kelly always seemed to set it off!
Retourne Kellys are decided more casual, to me, and they are so friendly with their shoulder strap. I would suggest going to a store and trying one on. Even if it means a day trip to do so! You never know, you may always love Birkins, but Kelly may steal your heart!