Ok, because I like posting pictures here's a view of the groups I strive for, and the groups I'd be dissapointed with. I just stuck these in the target so you'd get the general idea, i didn't want to haul the target back and forth up and down the stairs to shoot them.

My idea of a good 10 yard grouping.

My idea of a bad 10 yard grouping.

My idea of a good 20 yard grouping.

And lastly my idea of a bad 20 yard grouping.

Those are the types of groups I like and the type I dislike. Call me a perfectionist, but I like knowing pretty much exactely where my arrow is going to hit. No guessing about it.