I prefer grocery shopping alone. This is partially because shopping with anyone else--a roommate, a husband--inevitably conjures the relationship between a parent and a child, and I don't like playing either part. "Can we get the tomatoes?" "No, the tomatoes are really overpriced this week."
Plus, when shopping alone, I can't get talked out of purchases like mustard greens and turnips. I fought hard and won the turnip greens today (Husband thought they were spinach) but lost on the turnips and the parsnips. Turnips and parsnips, though they sound like Victorian poorhouse food, actually taste a lot like potatoes, but cost about half as much, as they have that poorhouse connotation. And even if I didn't need to watch the budget at the grocery store, I kind of like to. It makes the project a challenge instead of a classic chore. Think about how many things you've never actually eaten from the produce section. I recommend the turnip greens.