This.Sunyshore City is my favorite place. I love the sea, the music, the solar panel roads, and the restaurant close by.
I'd choose Solaceon for the very same reasons (silly or not).I'd have to go with Solaceon Town, its got the day-care centre and plenty of nearby patches for berry growing... silly reasons really, but I really just like the feel of it. I'd live there if I lived in Sinnoh! ;)
What about everyone else?