Do you eat for fuel, desire, or both (on average)+

Not me.  The only things I put in my mouth that I don't enjoy eating are Gu and medicine.

The answer to your question obviously depends on what you are eating, but in general, a more varied diet is a healthier diet.

desire, as I sit here eating my second lunch of a turkey wrap, salt and vinegar potato chips and a leaded cherry pepsi.....

I' ve got issues. 

LOL...funny you should mention GU.  I tried some on Saturday, between my ride and run (training),and I had to reach for my Camelback almost immediately to flush it down.  I was thinking to myself, "Jeez, that was quite the orange tasting throat oyster you just mushed into your mouth."  It was like slimy peanut butter...it just wouldn't all go down easy.  It did not help the GU was in my car and was probably about 100 degrees.

Fuel during the week and both on the weekends.  

During the week I basically eat the same thing as well... especially for lunch. It's either Subway or Quiznos. I got a lot of "Subway again? Don't you get sick of that?" It's more about getting something somewhat healthy, and can give me the energy I need to train at night. Dinner varies though as my wife tends to cook during the week. Breakfast is usually a peanut butter and banana sandwich, which I have eaten every day for at least a couple months (when I'm not traveling).

I find a comfortable mixture in between.  I have "guidelines" for my eating, based merely on trying to eat healthy (e.g. no fried foods, only whole wheat bread, eat 5-6 times a day, small meals, approx. 2200 cal per day)

but within those guidelines I tend to eat more for "desire" keeping the guidelines in place.

btw : did you know a bag of BBQ chips out of my breakroom at work has only 180 and no trans fat?

I try and eat for fuel but choose things I like mostly or in time become accustom to.

I have eaten the same breakfast for five years if it is a regular training day... friend's laugh at that....I do eat alternate breakfast before long rides or runs but always the same.

I find it interesting some eat the exact same thing each day.

I tend to narrow in on a few things I eat and repeat them over and over.

When I worked lunches were strikingly similar...kale veggie soup, spinach salad, and left over grilled meat usually chicken...and some fruit.

I think if you consume food in it's natural form and a good variety it is fine, but if you narrow your food choices to much ie not enough veggies or fruit might be good to add in some variety.

It's more that there are things I avoid because I either REALLY don't like them, or they don't fuel me well enough. But I'm a lot like you in that my breakfast and snacks are pretty much the same every day.

I eat for fuel because it's what I need when training. I've found a bunch of really healthy things I love to eat so just pick and choose from them each day. No measuring or weighing for me.

I'm also really lucky that my wife is a fabluous cook and makes stunningly tasty healthy meals so I get plenty of variety there.  She takes care of dinner (which often leaves leftovers for lunch) so all I have to worry about is first breakfast, second breakfast, morning tea, afternoon tea, late night snack....

Desire.  I LOVE to eat.  Cheez-its, 2 lb steaks, you name it...

I train so I don't have massive weight gain

desire.....though prior to workouts I will think about how this will feel later....

I do tris so I can eat more  

I eat what I want and what sounds good at the time.  I do make considerations for my training though.  Generaly the best energy sources I can find.  I may eat pasta the night before a long bike or run, lean chicken or beef...

But food is meant to be enjoyed IMO.  I love to cook and eat a wide variety of items.

Yes, we could all live on some basics that are just "fuel", a la the "mush" on The Matrix, but food is more than just fuel to me.  It brings people together, it can be used to celebrate and enjoy life...

There is so many things in life to try that are healthy and good for you.  Seems silly to me to restrict yourself to just a fraction of those day after day.

Both.

I try to eat a varied diet with a focus on vegetables, fruit and lean protein, but I also eat outside of those categories daily.  I do find myself falling into eating the same thing everyday, but like the other poster said, you lose out on key nutrients when you do that.   I constantly scan the produce aisle for something new to try to give my diet a boost.