Well - they get ME high. I assume that most people would get similarly intoxicated. And don't worry - they are 100 percent legal and safe. There is much more but I just listed 7 items.
1] Sifrei Rav Yosef Engel.
2] Tshuvos of the Har Tzvi
3] Watching Rav Ovadiah permit agunos in his Yabia Omer.
4] Sfas Emes.
5] Learning a looong juicy Tosfos with no rush. Just savoring every question and answer and seeing how much is under the surface.
5] Hamiddos Li-cheker Hahalacha [I approached his descendents to produce a new annotated edition but in the meantime ... no sale!].
6] Meshech Chochma.
7] Kisvei HaRogochover.
Swweeettt friends - may you all find Torah that intoxicates you!