>>4
Dracula is actually a pretty good example of the epistolatory novel, which was very popular in Victorian times.
>>2
>>3
As a novel it's a pretty good indication of the issues on people's minds: imperialism, the fear of foreigners, dissatisfaction with Anglican Protestantism and the allure of Roman Catholicism, the notion of "proprietry", uncertainty over gender roles.
tl;dr: it's not a "chick romance novel", you're illiterate, get off /books/