
vegetarian
This is a very complicated issue.
Vegetarians living in "rich" countries tend to have unusually good health, low rates of cancer, cardiovascular disease, and total mortality. ON the other hand, vegans are not healthier than their omnivorous counterparts. In fact, on average, they suffer from as many, or more medical complaints as compared to lacto-ovo vegetarians, who include daiey or eggs in their diet. With some medical problems (i.e. renal failure), a vegetarian-based diet becomes practically a nesessity, but even then certain types of vegetables, i.e. those that are oxalic acid-rich, would have to be avoided.
There are usually concerns about vitamin B12 deficiency since it doesn't have non-animal sources. Wild animals get their B12 by eating grass along with insects and worms in it, but people wash their vegetables, so how do they get this vitamin?
Some think that the friendly bacteria in the intestines produce some essential nutrients for the vegetarians, this again why vegans are in disadvantage since they don't receive probiotics with fermented milk.
As to your lifestyle, I cant imagine how becoming a vegetarian would drastically change it unless you'll have to start avoiding some parties and joining another peopl groups.