@Rahul-Balaggan See, from most I'd think this was a troll post. But I know perfectly well that is isn't and you are being entirely serious, which just make it that much more impressive.
So, for me the "Read" and "Buy" reasoning tends to be a bit different. I read... a lot. I can't top RB of course, but last time I checked I was over 40 titles and that's been a few months ago. I do have my own quality standards and will drop something that seems like a waste of time to continue but I love stories and enjoy reading and experiencing new tales.
I'm generally not going to bite on generic power trip isekai stuff, here or elsewhere. For me it has to actually add to what would otherwise be a workable story, such as Der Werewolf or Cooking with Wild Game, and not be the whole reason why the story happens in the first place. There are exceptions of course... being reincarnated into that world is core to AoB for example, but there is so much character and world building that it just becomes one (vital) cog in the story and isn't the story itself. I'll also make an exception for series that aren't trying to take themselves too seriously, like Black Summoner or Potions Loli.
Outside of that I read most everything else, especially anything that is pure fantasy (i.e. Slayers, Tearmoon, Altina, etc) or scifi (i.e. Clockwork Planet, Dendrogram).
What I buy, however, tends to be more strict. Simply put, there is more content than time to read it, even at my pace. So my purchases are always either something I can't read otherwise (i.e. Spice and Wolf, Baccano), something (physical) that I am buying either to give to someone else or make sure someone else has the chance to read it (i.e. First and Last Idol), something I know I don't want to be rushed in reading (i.e. my awesome FMP and Crest of the Stars omnibus hardcovers) or it is one of the few series I do see re-readability in (i.e. AoB, ID, Marielle Clarac).
Even before J-Novel I avoided the... less reputable places to find stuff to read. I'd pretend it's due to moral high ground but really it's more to do with not wanting to start reading something and then have it not finish. That can happen with legal published material - *looks at the 14 of 18 volumes of Eden in the bookcase, flips Dark Horse the bird yet again * - but it's more rare. I got burned enough by that back in the old manga scanlation days to not be willing to go though it again. The one series that is the exception to that is Hyouka, which is fantastic to read (as is the anime to watch) and which Sam's commented in the past that he can't forsee trying to licence since the existing fan translated version is too good/complete for it to sell enough to cover the expenses.
Speaking of novels, I think I accidentally wrote one here