• When they Cry (Umineko and Ciconia so far!)
• Retro & Indie games in general!
• Mega Man
• Bullet Hell, especially Touhou Project!
• Other Shoot-'em-ups and fangames (Gradius, R-Type, Twinbee, etc)
• Undertale! (I love Muffet...)
• Magic: the Gathering
• Metroid
• Shin Megami Tensei (incl. Persona)
• Jojo's Bizarre Adventure
• Pokemon!
• Junji Ito!
• ROM Hacks and Fangames!
• Final Fantasy
• Kirby
• SRW (sometimes)
• Terry Pratchett Novels

additionally

• Music in general!
• Space / Astronomy
• Zoology and Biology (esp marine, arthropod, fungal, botanical)
• Game design!
• Japanese language stuff!
• My friends' art and OCs!!!!
• Music videos!
• Voice acting!