From then on I found different ways to masturbate and realized that they all resulted in different orgasms, from concentrating the stimulation to various parts of the penis (head, shaft, front, back, etc.), to doing it sitting down, to standing up, from moving my hands to actually thrusting into my (lubed up) hands. Best orgasms have generally come from when I've held off for a while (a week or more) and really gotten myself worked up before orgasming. Some of these were around the time I first started... I remember one that happened in the bathroom when I was jacking off and just barely hit the "point of no return." I shot out just a bit of cum but then it suddenly stopped and I thought maybe I hadn't actually orgasmed/ejaculated, but suddenly it rushed back and hit like a ton of bricks. Some other memorable ones occurred after I started practicing edging, and after using Fleshlights and prostate stimulators for the first time. The latter is the only orgasm that literally left me shaking afterwards. Sadly, it seems that the intensity of orgasms are inextricably bound up in how often you have them, and for every tool/technique the effectiveness wears off over time. This seems borne out by the OP's story where the first time was so memorable because you'd gone so long before finally getting there.
[Link]