Hey there! I'm doitall, the local Half-Life addict!

I picked up a Dreamcast with one goal: Play the unreleased Half-Life 1 Dreamcast version. And while I did have to trade a Gameboy to get my first Dreamcast, it was a worthwhile investment. Suddenly, I was opened up to a world that expanded my aspirations further than simply playing another edition of Half-Life. OutTrigger, Kiss: Psycho Circus, Sonic Adventure, and even a polished version of Vigilante 8 2nd Offense... I was hooked.
About 2 weeks ago, I was browsing my local Goodwill, when I spotted it: A Dreamcast with a controller. They only wanted $12.49, I buy it without hesitation. I get home, hook it up, only to discover the GDD is dead. While I had never repaired a Dreamcast, I figured the issues couldn't be more compilated than swapping the GDROM with a new one, so I bought the next best thing: a GDEMU. It came in today, I installed it a few hours ago, and I am happy to report that the system is fully functional now

I have since swapped my first Dreamcast (working GDROM) with the Goodwill Dreamcast (GDEMU).
So... what games/homebrew should I download? :3