I have much weighed the pros and cons of the DDP and am constantly back and forth. Overall, it really depends on your style of eating and I'm in the same boat as you - my SO doesn't eat dessert (which can benefit me sometimes as I get two desserts when I can't decide which one I want
). In other cases, we'll get a cup of fruit or piece of fruit (aka a banana or apple) to go and eat it for breakfast or a snack.
The DDP can really save you money (even if you don't order the dessert) but you have to plan where you want to eat and be sure to make ADRs. We use the TS credits for dinner and try to go to places that only take 1 TS credit. For a "nice" dinner here and there, I usually look over the menu and debate whether what we want will really be worth the 2 TS credits. Sometimes I just want a lighter meal (a salad or appetizer only) at a signature restaurants and pay out of pocket for it.
My rationale is: the regular DDP is $40/day. My "lunch" or CS will probably be about $10-11 and a snack, no more than $4. That leaves just about $25 for a dinner entree (and a dessert if desired) to make it "worth" the cost, which can easily be achieved for dinner at most places (I usually only drink water or wine [so many joke possibilities here] and don't factor in a drink).
Plus, two bonuses to using the DDP is being able to use a snack credit for a bottle of water AND having less expense when we return because we've paid up front.
Hope that helps!