I just adopted my bun this week so I can definitely relate to what you are going through!
I second what Peppy said about asking the people who work there. I luckily adopted a bunny that was with a foster family first; therefore, they really knew his personality. Don’t be afraid to ask lots of questions regarding his behavior, his likes/dislikes, etc. I’m sure I asked a million questions, both before I went to the shelter and while I was there meeting him.
Finally, if you do bring one home tomorrow, don’t be discouraged whenever the sweet/cuddly bun you brought home isn’t exactly the one you met. I’m learning that the stress of being in a new home can change the mood of a normally sweet/charismatic bun. It’s a little discouraging, but I’m sure that time will make all the difference. For instance, when I first met him in the shelter, he had no problem sitting on my lap and being affectionate. Tonight I attempted to hold/pet him while watching TV and it ended up with him going on a scratching/nipping frenzy on my legs. It was my fault though…I rushed things a little too quickly so it’s not his fault.
Anyway, back to the point, just take your time in meeting them. Depending on the place where you are adopting, they will let you take your time. It’s a big commitment and they will completely understand.
Let us know how it goes!