These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Foe Yay: Eddie Poe and Vlad in Twelfth Grade Kills might be considered this. I mean, come on.
Don't forget Joss and Vlad! I mean, he made a whole Heel Face Turn, betrayed his previous views on vampires that he'd held dear for a significant part of his life, and turned his back on the Slayer Society (who, mind you, could easily dispose of him at any time) just because he "missed" being Vlad's "friend"? There's got to be more to that.
Not to mention how half of "Eleventh Grade Burns" is Vlad crying about how they need to be friends again! He talked about losing Joss more than Meredith!
Tear Jerker: "On it, in Joss's handwriting, was a single, short phrase, written in stark, black ink: friendship over."
What Do You Mean, It's Not for Kids?: The books are very short (the first two are both under 250 pages) and they're sold in Scholastic Book Order catalogs handed out to grade-school students...but with a "mature content" warning, largely due to the high violence level.