I gotta say, his Exclusive is quite interesting, he was a Mommy's boy (not hard to understand why, it was the only one of her children that was a wizard) and clearly very spoiled.
Gilderoy always looked like the lazy type despite being talented and clever, he has thirst of learning as would be beneficial to build his fame, the recognition he desired.
As for his magical skills that were good but become rusty beyond repair, that's quite understandable... if you look for his type of being Cherry:
CherryThis very rare wand wood creates a wand of strange power, most highly prized by the wizarding students of the school of Mahoutokoro in Japan, where those who own cherry wands have special prestige. The Western wand-purchaser should dispel from their minds any notion that the pink blossom of the living tree makes for a frivolous or merely ornamental wand, for cherry wood often makes a wand that possesses truly lethal power, whatever the core, but if teamed with dragon heartstring, the wand ought never to be teamed with a wizard without exceptional self-control and strength of mind.
also dragon heartstring being one of the most prone to accidents, so I think it's when the fame started he lost it, then becoming his skills rather rusty, no wonder he was such a useless teacher.
Despite the confirmation on him being Ravenclaw, some of the house were quite disappointed and surprised, he has many traits that are Ravenclaw, intelligence, talent, desire of learning as long was profitable, inventive (the hair-care system as one of his special abilities says enough) and eccentricity at it's highest with some few worst traits of Slytherin and Gryffindor - to go to any means to achieve his goals even if is unethical and morally wrong and quite a big ego (show-off), having more traits in Ravenclaw and the good traits mostly Ravenclaw.
in my opinion, the funniest thing about Lockhart, his egocentricity is very eccentric in a very funny way, so many moments of his biography is very funny just of how overconfident he was when come to Hogwarts and then discover pretty much everyone had similar or same experiences of noticeable of magical abilities, just the stories of his eccentricity is very funny, I can easily imagine it.
I did enjoyed read his Exclusive, is the most amusing and funniest Character Biography so far.