When I first started, I tried to stave off boredom with lots of variety. As the weeks have gone on, I find that I eat a lot of standby favorites and sometimes eat the same dinner a few days in a row.
Variety's important to me, but so is convenience. It's awesome to know without looking how many calories are in that english muffin with cheese, egg, and tomato or that vegetable pizza. It's nice to get a break from weighing and figuring up new recipes to enter them into Fitday (though I still write it all down), so relying on a few standards sometimes is a good idea.
Streamlining your plan is fine. It may be nice, if your schedule permits and if variety helps keep you on your plan, to think in terms of a set number of favorites rather than choosing the exact same foods each day, but I suspect that any of us who don't have personal chefs probably have staple meals. It works well.
