I think it’s just you.
It is true, however, that many themes have a common macro-structure. But I have to believe that’s a good thing. There’s a now-old book about web design titled, “Don’t make me think”, and these designs are probably reflecting that approach. It’s good if a user doesn’t have to figure out where menus are, or how to do basic navigation. I’m not seeing this as a problem.
In the end it’s the content, and the design + organization of that content, that should be doing the heavy-lifting and creating those “wow” moments. There’s lots of ways to accomplish this.
In the beginning of RW I’ll confess I bought a number of themes, but I very rarely buy a theme these days. It’s just not needed. I’ve opted for simple themes, that give me a lot of flexibility. For a “regular” theme I go with ThemeFlood’s Volcano or Flood theme all the time now. For “open-ended” themes I go with Foundation, but I’ve heard many good things about Freestacks as well.
Maybe these more open-ended approaches (either Foundation/Freestacks or very very flexible regular themes like Volcano or Flood) would allow you to create something that works better for you. But the cookie-cutter themes don’t seem that different to me either, and give me relatively little flexibility compared to the more versatile themes.