Well my 2boys one loves the shower one has no interest in it.
And wouldn't you know it is my largest beastie that always wants in the shower with me. I blame myself as when he was a pup I wanted him used to getting bathed in the bath tub. He is my water boy - loves all water! But at 110+ and lots of coat I don't want him in with me every day!
Razzle our Yorkie, never evidenced an interest in coming in with me. Just checking out the bath tub to see if MOm is okay in there. Also a trick for the laundry sink - I put in a high sider plastic box which lifts up the height so I don't have to bend much at all anymore. I also have the pet sprayer hose and that works well.