Yeah, if you're not into occults, I can easily see how you feel.
I haven't really touched Vampires since my test play-through after I got it either (though I love the Build-buy, and having NPC vampires in the family is kinda fun)
And Spellcasters, I've found, work better if magic is a hobby/secondary element as opposed to the primary story/gameplay. Which works fine for me, but can be disappointing for those who want to focus on magic.
Well, hopefully you at least find the Build/Buy elements useful.)