Make sure to visit the OmniFocus web page and check out the screencasts.
The biggest thing that I liked about OF is the weekly review mode. Learn to get comfortable with that and you'll be flying.
Things is nice because they have these preset views such as people and today.
OF may be a little tough to digest at first. I've found that OF's flexibility makes it an incredibly powerful tool. You can experiment with different folder setups, different project planning setups, and so forth. I've learned to tweak my setup just a little at a time.
I'm sure you can browse through all the forum threads for days and find out how other people have set up their OF to work for them. We have to remember that everybody works differently.
Learn how to use perspectives and you can imitate many of the preset views from Things such as Today.
Kourosh has thoughtfully provided some tips on his blog about using OmniFocus in these forums. He has a variety of tips that have helped me with my workflow:
I have wanted to like Things and I've contemplated switching. But OF just keeps me locked in when I miss things like review mode in Things. Yes, you are right. It's aggravating to wait for Things to catch up with some of the features that OF already has. I've made the switch to OF and haven't looked back.
With the combination of OF on my iPod touch and on my MacBook, I get so much more done. Eagerly awaiting OF for the iPad and OF 2.0 for the Mac!