The tough thing for me is doing things to taste like my wife. I have to follow a recipe exactly and then tweak it. She'll just grab stuff and throw it together and it comes out great. About the adobo though, it's definitely easier to cook in the crock, but it's hard to get a sense of the sauce. When cooking on the stove top you boil the sauce, add meat, and simmer for around two hours depending on volume. Doing it the latter you can adjust the sauce while it simmers. The meat isn't quite as tender as the crock pot recipe, but with the option to tweak the sauce on the spot it allows for making it tastier.
Oh, and I use shoulder typically. Last week Kroger had it on sale for 99 cents a pound.