Hey thanks guys! To clarify I certainly feed my worms more than just coffee grounds, I was just explaining how I add water to get the rest of the grounds out of the press and add moisture to the leaves because they do get dry. My bin is large lengthwise not depthwise, so it's good to hear that huge surface area is preferable. I wasn't aware they enjoyed melon so much - I've been avoiding citrus obviously and in turn denying them most fruits beyond banana peels so that's great news as we start to roll into melon/cantaloupe season. I keep my wormbin in my (finished and heated, but still probably in the low 60's) basement so as the temperatures outside start to rise this Spring they may start consuming a bit faster.
I was really only concerned because:
a) the wormbins the man I received my worms from and the ones at my university were composed of "black gold" predominately after this same time period, while mine is still a great deal of leaves
and
b) there are some small bugs living amongst my worms now, which I read can be due to them not consuming their food fast enough.
I appreciate the clarifications and advice guys! I just shredded and fed some celery leaves and banana peels to my lil' fellers a few minutes ago. If you have any pointers or concerns I should have regarding these small insects please do share.