My system came with Hang On / Safari Hunt. It is the type that had the games inside the system, so if you don't boot the cart up the games auto boot. I still have the system in my house.
We bought a Master System over a Nintendo because it had Hang-On on it. I liked D&D, so I bought Miracle Warriors because it said "Sega's First RPG" on the box or something.
Miracle Warriors, Hang-On, Altered Beast, Space Harrier, Ghost House, Zillion 1 and 2, Fantasy Zone, Transbot, My Hero, Great Baseball, Choplifter...
Double Dragon was always my favorite. The art, music, and overall atmosphere of the game was incredible. Just thinking about it brings back a flood of nostalgia. Music!!!
I was sad we never owned a Nintendo, but I am very happy that we owned a SMS. Micracle Warriors provided enough entertainment and really introduced me to video game RPGs.