Any question answered...

Ok, this is totally my field!

also why does cheese taste better when you grate it and mush it back together in little blobs?

I hope you're doing that with some rubbish cheese and not some of the world's finer offerings!

Probably just because that gives it a chance to warm up to room temperature. Cheese straight from the fridge just tastes of cold.

Boom! Ten out of ten! A good piece of cheese needs about 2 hours to warm up properly before you scoff it. In fact, this is true with most ingredients in your fridge. Ideally, keep cheese wrapped in waxed paper in a cool cupboard, cellar or larder instead of your fridge.

More surface area in total, makes it more flavoursome.

Not a bad guess. This may have some truth in it, but I think mdcc's guess would be more accurate.