Long winded answer to question - too many dogs!
Peach (Chesapeake) gets bathed when necessary. She's so old it's really hard for her to stand that long and she doesn't stay outside for very long so she doesn't get quite as nasty. She does get brushed often to keep her shedding level down (if there is such a thing).
Carly (Mixed breed) has to be sedated when we bath her (very infrequently) because the people we rescued her from used to throw her in the pool and she's still TERRIFIED of water. Carly is not fond of the brush. We can get some of the shedding fur off and then she runs around the yard before we're done.
Max (Dachshund) has allergies (flea saliva & dust mites) so he get bathed every month (or sooner if needed). He also has to have his Frontline applied regularly. He also gets allergy shots and he still chews his feet. Poor little guy! Max loves to be brushed, even though he doesn't really need it. I bought a baby brush for him. He loves the light rubbing of his skin.
Molly (Yorkie) gets a bath the same time Max does. She has found every spot in the yard that she can used to get dirty. I also have her clipped every 6-8 weeks. She hates the brush, but I do brush her as often as I can get her to stay still. I'm currently trying a new type of brush and she doesn't seem to object to it quite as badly - so I'll keep my fingers crossed.