Quote Originally Posted by impulse View Post
I understand that but there must be a reason why Много takes genetive case. This adverb must be the genetive form of a word. Maybe it has the nominative, the accusative, dative etc equivalents? Like in English (if I am not mistaken) "lot" means "many of something". So it is used as "a lot of cars". My point is "a lot of" in English has a reason for the way it is used so Много must also have a reason.
I must correct some of the previous answers.

много is an adverb only when used with verbs. For example "много работать" - to work much.
When много is used with a noun it is a cardinal numeral (at list my vocabulary says so) and follows the rule that cardinal numerals (with some exceptions) require genitive after them.

As for intuitive reason... just get used to the language and you will find the reason. It works only that way. As well as in English.