First, he's the original YA rebel/bad boy. Born with a birth defect (clubfoot), he was very shy. But early on his good looks won him the attention of females of all ages, including (supposedly) his nanny. He had a slight weight problem during his youth, so he tried drastic diets to shed the pounds. He became obsessed with his looks as he tried to dodge the boys who bullied him...and won the hearts of the girls who found him irresistible. Shall we call him the original Emo, as well?
Second, I love that he pursued his happiness. Shunned by his father and plagued by an overbearing Scottish mother, he longed to travel. He went on the "Grand Tour," visiting Italy and Greece. He began writing stories and poetry, and his works earned him overnight celebrity. That, along with a title, made him even more irresistible to the ladies. Some say he might have been bipolar, and he claimed that writing was his only outlet. He kept his personal demons at bay through the hours he spent putting words on paper.
And lastly, I love that he stood up for his personal convictions. Even though he was a notorious heart-breaker (not always his fault), he tried to do right. He attempted to provide for his child born out of wedlock. And later, he fell in love with Greece. He was so enamored with the country and its people that he joined their fight for independence--eventually getting him killed when he died of malaria near the battlefield.
But what about his writing, you say? Oh yeah. That's pretty FANTASTIC, too!