Do you prefer chocolate or vanilla cake?
I prefer vanilla, especially if it has an interesting frosting flavor. Chocolate is too heavy for me.
Vanilla is a universal flavor.  You could put many different frostings that would match it. 
Yeah, I especially like fruity frosting flavors. I also like marble cake and carrot cake (the only form of vegetable I like, haha).
Having Carrot Cake can count as one of your 5 vegetables for the day!
I'm thankful for that. At least that way I can get one vegetable out of five. I also tried making zucchini cupcakes. They're not bad. I can hardly taste the zucchini.
You could great and shred up vegetables and hide them in most food that you cook. 
I've been trying that a little bit, like with the zucchini cupcakes I mentioned. I read that you can hide spinach in brownies, too.
Really anything that has sugar in it could hide the flavor of the veggies!
It depends on the vegetable. Some of them have really strong flavors, like onions. I don't think I would like an onion brownie.
Ya, that doesn't sound very good.  Putting onions in meat meals usually hides the flavor and the texture. 
The thing is, I don't eat meat, either. I'm a vegetarian.