It would have to be the ones where you do the hand-holding, but definitely the ones where you help bring someone back and they thank you.
I've had 2 cardiac arrest saves. The first one was someone in cardiology, and he didn't believe us until we showed him the strip. He looked for us at the station for 2 weeks to thank us for saving his life.
Little old ladies and war vets are the ones I'm suckers for. While working in Newark, and I was precepting, we were called out for a CVA. As I'm doing my assessment, I see a picture of a WWII soldier in the room. I ask his wife if that's him. She explains that he was a part of the Red Ball Express. At that moment, my crew and I stood up, saluted him, and shook his hand. While he was having a CVA, you can see that he was at ease with us.
Just Friday night, my partner and I got dispatched for chest pain. While the 12-Lead didn't show a STEMI, I felt something was wrong. My partner and I sat with her for a half-hour to convince her to go to the hospital. She gave in, went with us, and couldn't thank my parter and I enough for helping her, and our bedside manner.
I would rather take care of a little old lady any night, than someone who has gotten shot, stabbed, or crashed. The little old ladies seem a lot more appreciative.
Long story short: be nice to your patients, even in the big-bad city. It will help them feel better, and will not burn you out in this field.