I can't agree more that Umisho's fan-service doesn't seem too overpowering. Although, I'm not sure I can call it tasteful since we have Ikariya, the president of their swimming club or whatever.
Regardless, I still like him and I find him to be absolutely hilarious! I can't wait to be introduced to more of Umisho's wacky characters. I am really really attracted to the character design, also.
Is it too early to ask how many episodes are planned for Umisho?