Last night I was having my evening snack of banana with peanut butter. Bunnicula, a rather shy rabbit that has been in the house hold for just a couple months, caught whiff of the yummy smell. She cautiously came across the room, nose twitching. I handed her a small chunk and she ran off to eat her bounty. A moment later she leapt straight into the air with foot wiggles. My husband was perplexed, what's that? 
That was Bunnicula's first binky in our home! 
It got me to thinking about the various ways my rabbits have to say they are happy. The boys (Gary, Houdini, and Panda) all do the more typical running binky with crazy twists and turns, each with their own signature moves. The girls have more variation. Apparently Bunnicula prefers to jump from a stand still. Sophie is our big girl and she does a high hop with a head twist. Becky is special needs with mobility issues, but she will do a head twist with a full body shiver. 
Don't forget the tooth purring, nose bonking, and kisses. 
When Sophie came to our home over the summer she was not a people bun. Houdini had just lost his first bunwife and was in a deeply grieving state. We let him pick whom ever he fancied at the rescue. He picked Sophie. She loved him but hated us. She had good reason to distrust people. Her first "owners" were children who would pull her ears and tossed her away when she got to big. Then she was put in a small cage with little human interaction other than being tossed pellets.
I practice pet massage, so even though it was only a minute at first, she got a gentle therapeutic touch for the first time of her life. She would flinch if I touched her ears, but I just kept with daily short massages. Now I like to think she looks forward to this interaction. She will sit on my lap for an hour or more while I stroke, kneed, and massage her whole body. She likes to lay her head down in the crook of my elbow and tooth purr, eyes closed, legs outstretched so I can get her paws. What girl doesn't like her feet rubbed? While it is more of a sleepy contentment with life, I have to admit I love seeing this quiet expression of joy just as much as the more exuberant displays. 
How does your rabbit let you know they are happy?