Vegan? Vegetarian? Paleo? High Carb?

I personally believe in the field/farm to fork philosophy.

i'm of the stay out of the aisles at the market philosophy.

It sounds like you're writing a research paper...

What reasons made people choose their specific nutritional plan and why they feel it benefits them.
My brother had been doing Paleo/primal for a few years with great results, I started CrossFit, read Robb Wolff's Paleo Solution, did the 30 day challenge, and love how much better I feel, just brought some dairy back in after the initial 30 days. Experimenting with percentages has given me 40-45% fat, 30-35% carb, and 25% protein.

Was the transition hard?
Surprisingly not, the cravings for sweets and processed carbs went away within the first week, pop back up when I have a "cheat" meal. Eating protein at breakfast was the hardest thing, I just can't handle the suggested leftover dinner for breakfast, but eggs or greek yogurt work for me now. I know longer have afternoon fatigue.

How long they've been doing it?
Feb of this year

And can I peek at your diaries?
Yep, it's public. I'm not 100% strict, I don't know anyone that is, but I try, some days are more successful than others. I'd say 90% paleo/primal.

"I personally try to just eat as clean as possible as minimally processed as possible and organic if I can, with a wide array of vegetables, fruits, nuts, seafood, lean meats, and slow digesting carbs with a side of chocolate. "

Sounds like you've got it figured out, we're essentially doing the same thing.

i personally believe in the paleo lifestyle which is either grass fed, or lean meats and veggies and natural fats.

I'm "flexitarian" as much as I hate that word. I eat meat-free 90% of the time, but sometimes I really want some animal protein, in which case I'll eat some. I've been doing that for about 2 years now, and it's a good balance for me.

Rarely eat junk food. Eat when I'm hungry-ish .. to a certain extent. Limit processed carbs (but I might murder someone without oatmeal or bread). Good protein sources. That is all.

I try to base my diet choices on research.

I try to keep saturated fat low, sodium low, fiber high, protein at least 10% of calories, and avoid HFCS.

I try to eat foods that offer benefits beyond their macros such as grapefruit, tomatoes and spinach.

I drink some alcohol just about every day.

I exercise quite a bit.

I'm not always successful at following those guidelines, but I think my diet is working for me so far.

I am vegetarian. I was vegan for a few months when I first returned to vegetarianism after a few-year hiatus. That is my ideal, but it is just not easy to do right now. I was not getting enough protein, so now I am a lacto-ovo vegetarian. I don't want to cause harm to animals, particularly those in the slaughter houses and factory farms, so I won't eat them. I only eat free-run or free-range eggs. Dairy for me right now, unfortunately, is just dairy. I don't drink glasses of milk, but I do eat cheese and yogurt. Someday I wish to give them up, but it won't be today.

Raised vegetarian, made changes to include more protein and fewer carbs earlier this year. I know I'm deficient in some things like iron and B12 (and therefore get tired easily), which I now take supplements to aid with, and I'm constantly seeking new sources of protein.

I'm in the camp that tries to piss all those camps off with my diet

I eat pretty much everything except for grains and potatoes just cause I don't like them all that much anyway. If someone else cooked it I'd probably eat it as to not be rude. I don't eat much dairy aside from raw butter and if I get coffee from a coffee place I'll put milk and sugar in it. I eat ice cream also. If I didn't buy it then I'll eat the regular dairy one and when I buy it I get the coconut milk kind. I try to aim to keep my macros at 40/30/30 but I tend to go over on fat and not meet all the protein often.

There wasn't much of a transition aside from me being lazy. When I cook I find grains and starches take the longest to cook. Since they're flavorless on their own and I don't care too much for them anyway, I just don't even bother with it. I couldn't just eat plain rice or potatoes without a lot of sauce or something on it. Same with oatmeal except I'd need tons of sugar, butter and milk to even enjoy it. I find I can get all my carbs from fruits and veggies anyway.

I am a Vegetarian, I lost my taste for meat and meat products...Its been about six years and the transition was easy because I have always loved vegetables and fruits,