My story
I grew up in a family of meat-eaters. Being Nepali we ate a lot of mutton, pork, buffalo, chicken and fish but beef and sea-food like crabs was on the menu as well every once in a while. I am also not a stranger to blood-shed as every Dashain (Dussehra) most families slaughter goats or chicken (sometime communities or very large families sacrifice buffalo) and seeing animals being killed at temples is quite common as well. As a child I used to help shave the fur off the carcasses and remember roasting goats ears over an open fire (it's what kids do). During my teens I used to fish quite a lot in lakes and have slaughtered chicken for picnics etc.
It was in my early twenties while volunteering at a small organic farm in Germany that things started to change for me. The farm had European water buffalo, Galloway cattle and sheep along with some horses and donkeys. It was while working with the animals that I realised that they are all extremely intelligent and each have their own personalities. I understood the need and demand for meat and I drove some of the animals I took care of to the slaughter house. I still ate meat, I was just a bit more aware of where it came from, it was better for me to eat meat from an animal which had a name rather than from a factory farm. Back in Nepal I stopped eating buffalo except when I was in a village (how they transport animals into Kathmandu is terrible, in a village I could ask whether it was from an animal they had reared themselves) and ate only local chicken as opposed to broiler.
Around 6 years ago I decided I was ready to stop eating meat (was still eating fish, dairy and eggs). It had been troubling me(industrial farming and animals being mistreated) for a while and thought it was now the right time to stop. About a year after that I stopped eating fish as well. It's now been about 2 years that I stopped dairy and eggs and finally became vegan. I still have leather shoes and clothes made of wool or down but I am in the process of phasing them out.
My wife and I are now vegan. There is no moral superiority or elitism involved. It's just a choice that we made based on our love for animals. We do not like how animals are treated in the food industry and do not want to be part of it anymore. We have a dog who is vegan too.
Line in the sand
Some of you have been talking about plants being alive and capable of suffering. My current line in the sand is beings with a brain and central nervous system. We might hypothetically share more of our DNA with a potato than a goat but for me the goat is something I can interact and communicate with. It is a matter of relate-ability.
Health and diet
We are all active especially running, trekking and climbing. I run 1-2 Ultra marathons each year and train boxing 2 times a week. My wife runs as well, is very strong and is a yoga teacher. Being vegan hasn't had any impact on my strength or performance, I am fitter and stronger than I was in my teens. I have also been pretty much the same weight since I was 16. I do not take any supplements (multi-vitamins or protein powders).
It has been quite easy to make the transition as we both like cooking and experimenting in the kitchen. As mentioned no supplements so we make sure to eat a varied diet and food-pairings are quite important (some vegetables go better with others, some grain and legumes paired together provide complete proteins). As mentioned we don't take supplements so we have to make sure we get enough iron (leafy greens, cruciferous veggies) and B12 (Yeast extract, nutritional yeast flakes and sea-weed). The internet is great for ideas and recipes.
We also buy organic food and source most of it from a local farm. I look upon the extra cost and hassle as an investment, hoping that I will be able to avoid the more common life-style diseases in the future. Only time will tell.
Eating out can be a bit of a challenge as most chefs are not really into making good vegan food. When we have to choose a place to go out, we also have a look at Happy Cow -
https://www.happycow.net Thoughts
I know we have evolved to be omnivores and that being vegan is perceived as being 'unnatural'. Being in front of screens all day, driving in cars, flying around the world, wearing clothes, reading and writing, even eating cooked food is all unnatural and are recent developments that we are not really designed for but we do it anyway. I believe in being open-minded and willing to change. It is technology and the understanding of nutrition that allows us to be vegan(and thereby reduce the suffering to animals) and I am happy to embrace that.
Getting enough protein (or other macro-nutrients) is not an issue at all with 100g of soya(as an example, there are loads of legumes, nuts, grains that we can get a good balance of nutrition from) containing more protein than 100g of meat. Micro nutrients are more complicated but not difficult.
You can also be active and healthy. Well-known athletes such as Venus Williams, heavy-weight boxer David Haye, MMA fighters Nate & Nick Diaz and Jake Shields, Ultra-runner Scott Jurek are all vegan. These are just the ones that I know off the top of my head there are lots of other top athletes that rely on plant-based diets.
There is a lot of pressure to be 'normal' and eat meat in my life. In the sub-continent it is 'cool' and 'progressive' to eat a more westernised diet with lots of meat. In the western world, vegans are perceived as fussy and uptight people who want to guilt other people out of eating meat. I do not think it is the case with most of the vegan people I know, most just do it on compassionate grounds because they do not like how animals are being treated around the world.