One that I have always stuck with has been exercise. A physical training regimen is not hard to stick too as an aspie. It became my routine. And we all know about routines . In fact a lot of people in the lifting community share my weirdness.I went through a dino-obsession phase, too...except mine waited until I was 9. But, like you, I could pronounce the multi-syllable Latin names.
Hehe.
oh and saying "various different" was probably unnecessary