I voted for "Bonded right away with my cat" and "we adopted our cat together"- my bf never had cats before, and had been severely allergic to them for the past few years. I started volunteering at the shelter to get my "fix" and fell in love with Albus. My bf had noticed that his symptoms around other people's cats was not as severe anymore, so I filled out the paperwork to adopt Albus on a trial-basis.
Just before we were going to take him home, he came down with Fatty Liver Disease. It was really bad and they weren't sure he was going to make it through the night. He did, and the next day, I brought my bf to the shelter to meet him for the first time.
Even though Albus was not looking so good, it was love at first sight with the two of them. We brought him home and my bf's never had a reaction to him. And the Fatty Liver problem is gone!
So technically, we adopted him together, but he didn't meet him until after I decided and they were instantly bonded at that point.