I'm 5'10" and currently weigh 162 lbs., which is in the normal range for my fairly large frame. I put overwieght though, because my ideal weight is in the 140-145 range. Before I became a veg*n in March 2003, however, I topped out at 198. I lost the first 20 pounds fairly easily, then stopped losing for a long time. Since I stopped eating out in restaurants 5 or 6 times a week, I've started losing pretty steadily again without much real effort, and I'm pretty pleased with my overall rate of weight loss, which is three pounds a month, a good formula for keeping it off. FWIW, I started out as a strict vegetarian, which for me meant no obvious dairy or eggs, but without getting freaked out about trace dairy or eggs. As I learned more about hidden ingredients, I've transitioned to Veganism. I also stopped eating most processed carbs, I eat bread in general very rarely and reduced my coffee consumption by about 80%.
The only time in the past eight years that I have been thinner than I am now was when I returned from a year in Puerto Rico at 135 lbs., which my husband categorized as "gross." I was super, super active down there, swimming, snorkeling, SCUBA diving or kayaking just about every day, and I was also mostly vegetarian the whole time I was there (couldn't afford much meat), and there was no fast food on the island on which I was living. Also, restaurant portions in Puerto Rico were mostly smaller than in the United States, the milk is UHT and nasty, and the coffee is gross.