I liked NES Chiller, Phantom Fighter, Master Blaster, and a few others. What I still like about the old games were they were pretty challenging. I liked a lot of the old games like Bionic Commander for how hard they were, and you had to problem solve some stuff. In those days it was call a number for help or figure it out. I miss hanging out with a group of friends or family playing video games. Gaming online just doesn't come close to hanging with friends and smacking the controllers out of each others hands.
I remember calling that number a few times. I miss the days of trading save codes from games too. I remember getting calls from guys in my class asking me for the code that let you jump straight to fighting Tyson in Mike Tyson's Punch Out.
Modern games are better I guess, but I feel older games had more charm and depended much more on gameplay than newer games. Today, games can just have crazy graphics and everyone raves. I did not play Battle toads or Marble Madness for their graphics and I still remember those games perfectly to this day. They were challenging and fun. People seem to forget these days that video games are ultimately supposed to be fun.