its basically a boring "webcomic" that bored me throught the first few pages, people will urge you to wait till the third or later chapter and say it will get better. -__-
You have a whole subforum to say stuff like this. Shoo.
As for the best part about it:
It's a bit messy to read through, I'll say that. It's especially messy when you note how the plot is semi-crowdsourced at the beginning. But there are a few key things about it that make me recommend it to people to read through.
Most notably: It's a very interesting and unique way to tell a story. It combines video games, webcomics, animation, and a unique chat-transcript method of narrative. The closest analogue might be reading a movie script, but even that differs extensively. It's a form of story telling that can only exist in a certain medium, and you won't find anything else like it.
I also love the creativity of the fandom. A lot of the artwork is very styilized and leaves a lot of room for interpretation and imagination. People have taken very simple basic designs and created some amazing pieces of art.
Going in the opposite direction, at times the art in Homestuck is amazing when you consider it's all done in MSPaint. There's some really neat panels that can be truly amazing to turn to.
The characters. It does suffer a bit from having too many characters and not all of them are fleshed out terribly well. (looking at you Tavros...no idea what's going on with you). But there are many interesting characters to latch onto as well.
Is it just a 'trend'? I don't know. Was sailor moon just a trend? How about Iron Man? There's more to homestuck than simply being popular at conventions, similar to how even Naruto had something that garnered so much popularity for it at the outset. It may quiet down as people move on, but I doubt the fandom will die down moreso than other popular works of fiction, especially considering the sheer range of creativity that Homestuck can inspire.