Like both, especially if the restaurant is like an old-fashion 'mom and pop' kind of place. Home cooking is the best IMHO. But cookouts can be more romantic. So cookout.
Sailing on a sailboat or water skiing?

Tough choice for sure. We love both. Riding a motorcycle allows you to find and visit sometimes relatively unknown or obscure places of history. But nature preserves can bring peaceful solitude. I guess it depends on my mood, but if had to definitively chose one, nature preserve.
Adventure in space, say visit moon or Mars, or adventure on earth, trying some new and perhaps frightening?