I too find it boring to work on so many units the same but I know I will like the end result. I think I also hold a grudge against certain units. I struggled more with the chevrons in earlier quilts like Celtic Solistce and I can now make them more accurately but I grit my teeth and don't like them. It doesn't make sense to be upset with them because they are 2 seams like the flying geese so it must be a grudge....
If I could be granted a wish though it would be that the next clue is combining some of these units into a bigger unit. The mystery is fun but it always seems like we are given a lot to do with the final clue.