I've done both lunch and dinner there so I'll just give my observations:
Dinner: GREAT character interaction, they spend some time with you and play around a bit. I remember seeing Meeko in 2003 (and he was one of the most interactive characters that I've ever met!) but i dont think i saw him in LTT in 2004. Chip and Dale spent a lot of time with us though
If you like what LTT serves, then you'll love dinner cause it's all you can eat. I love the stuffing....i don't let up. Same with mac and cheese and potatoes (I'm a starch-head
).
But if you already saw the lunch menu and like it better, then there's no reason to go all you can eat for something you arent as excited about. The dinner menu is a "thanksgiving" meal. Lunch gives you more options.
Negatives: For dinner there is always a crowd and often a wait. Though i find getting there before your PS time can help get you in faster...no joke, ive gotten in there in 5 minutes for DINNER during this past December during Christmas week. But generally that luck doesnt surface so you will have a wait, around 30 min often.
Lunch: Much more casual, less wait, you dont have to get there as long in advance.
You have more variety in the menu then you do for dinner. Though no all you can eat. I think you can also choose your dessert which you cant do for dinner.
I prefer dinner mainly cause I love the character interaction and the food so all you can eat is very cool. But there's something to be said about a nice somewhat quaint lunch sitting by the fireplace