I can't imagine repeating the same meal every week. I think we'd both revolt.
One time I tried making the same fish every Monday, b/c that was the day I shop for the week, and I would buy fresh/never frozen trout (neither of us like prefrozen fish). I was trying to get at least one serving of fish a week. I just cooked it in the pan with garlic parmesan seasoning and some lemon, because it was tasty and very very easy. Finally DH, who never complains about food, asked if we could take a break from that dish
However, every two weeks or so we have a curry dish. Either one of two ready-made brands we buy at costco (in their refrigerated section...seriously, you cannot believe the fresh made taste -- all natural ingredients), or my own. And every weekend lately we've been grilling one night -- different stuff, though. And every few weeks I also make sort of a "hash" rice: toss leftover meat into the rice cooker with basmati, chicken broth, olive oil, salt/pepper, peas, maybe corn. Sometimes I'll change the "flavor" with different spices (such as cumin, curry, garlic, ginger) or liquids, like add in salsa verde, rotel, soy sauce, etc. It's very very simple and comfort-food tasty
I do, now and again, plan a few weeks or month's worth of cooking, but then I see great recipes in my magazines or online (hello Pinterest!) that I just have to try. And even when I stick to the plan, only a handful of those recipes are "the usual suspect". I'm not a "real" chef, as in I mostly follow recipes, and I don't necessarily love to cook, but I do love to eat! Mainly, I love trying new foods, so eating the same meal repeatedly would be like loving music but listening to the same album over and over. That being said, I never choose recipes that involve a lot of steps, ingredients, or are too expensive (unless it's a weekend night, which would make it cheaper than eating out).
I do, however, tend to repeat the same simple sides -- grilled zucchini, rice, sliced tomatoes, stir-fried squash, roasted carrots and potatoes.