Well, I'm going to third the suggestions of Yotsuba&!. It's SO funny, and really cute, too! It's also the cleanest manga on the shelves right now, I believe. XD I'll also suggest Rurouni Kenshin, if you haven't read it yet, DO so. You'll love it.
Also, I'll re-suggest Full Moon wo Sagashite. Because it's clean and lovely.
Oh, and while I'm here, I'll suggest Tsubasa Chronicle. It's very action-based, though there is a prominent love story, too. I haven't read the entire thing, but I've enjoyed what I have read, and there's been no fanservice at all. Hope you find something you like!