Beyond the galaxy clusters, I think the most fun that I have had in the last year was when I sketched the Crescent Nebula. This nebula was fun from the very beginning, all the way from star hoping to it, choosing the correct magnification filter combination to sketching it. Even choosing to show it to you was enjoyable, due to the memories it brought back. Here is my sketch of it, that was completed using my 10″ dob from last fall.
I have always liked your sketch of NGC 6888. It makes me want to observe it again, but from a true dark site, rather than my moderately light polluted backyard.