You probably know bunnies are curious. A curious bunny may climb on you. It may be assessing you or what's on you that interests it.
A rabbit may crawl on you for attention or food. A rabbit that does this for attention will likely continue. You may see unusual behavior.
Like the last point, a rabbit may groom you on you. However, it may hop on you to groom! Your pet may want to grab your hair.
When it crawled on you, did your rabbit fold its ears? A rabbit may crawl on you if it feels threatened. It may need your comfort.
We discussed rabbits' charming reasons for climbing on you. This may not be as charming to others. Your bunny may hop on you to show you or others who rules.
Rabbits like heights. One can climb their owners to use their height. They may want the whole room. They may want to see something but can't. Their curiosity.
Finally, bunnies can climb on owners to show affection. Maybe the pet wants to bond with you. It may want to know you instead of just being curious.