I nearly always get hoppers, usually for a specific reason. For several of our trips, it was during the Food and Wine Festival. We almost always started our day at MK, AK, or DHS, then hopped to Epcot in the mid-to-late afternoon to end our days @ F&W. So hoppers were a must for this type of touring.
But one trip, I was traveling solo and "automatically" bought a hopper (I had always had one in the past, and assumed I'd need one for my solo trip). Surprisingly, I only hopped once or twice on an eight-day trip -- and realized that the reason I had hopped so much in the past was because my traveling companions loved the wine festival, and (since I don't drink!) I wasn't nearly as interested in going to Epcot on the solo trip!
So it all depends on what you want to accomplish, and how much you're likely to hop. Now, I always think about hoppers on a "per use" or "cost per hop" basis. The hopper option costs around $60, whether you use it once or seven times. With only one hop, is it worth it to pay $60? Probably not. But if you hop every day for seven days, it ends up being $8 per hop - much more reasonable of a cost.
And remember, you can always buy your tickets without the hopper option, and add it later. If you're unsure, that's what I recommend to people. One year, I bought the "Water Parks Fun and More" option, and didn't use it once because it was too cold to swim. What a waste of money!