This is a big reason for me. I like novelty, change, and experimentation, and rock music, as a subgenre of popular music in general, is always evolving. It brings in some of the best bits of everything else.
I also like the simplicity, especially when it takes more complex styles of music & fits them to a rock music format. Sometimes expressing something in a more simple manner is far more difficult than doing it in a complex way. It also makes rock music seem very raw, which in turn, feels real & emotionally moving.
When this combines with intelligent lyrics, then it's a great combination of technical simplicity & emotional complexity. Some of the most difficult things, especially emotionally, are communicated in a relatively simple way.
As an extension of this idea, rock music (again, being part of popular music) is "the music of the people". I can see why the self-proclaimed, elitist, aristocratic elfboy may not find this appealing

. However, I find the accessibility of it very appealing. This is music ANYONE can make. You just need a guitar. This makes it very relatable to the everyman because it is made by the everyman for the everyman.
I also enjoy the lyrical content. The genres you list [MENTION=5684]Elfboy[/MENTION] don't seem to have in depth lyrical content. Rock music has become increasingly poetic since, IDK, the 50s (?). The modern poet is arguably the rock singer-songwriter, as few read contemporary poetry anymore.