I grew up playing Genesis, actually it was my first system I played on. This system has so many great titles, but most games I didn't even play until later on I also like the music on most of the games as well.
(Not in order)
1.Vectorman
2.Sonic 2
3.Sonic & Knuckles
4.Comic Zone
5.The Punisher (looks bad but really fun)
6.Golden Axe
7.Streets of Rage 1
8.Streets of Rage 2
9.Columns 3
10.Rocket Knight Adventures
Systems: Sega Dreamcast(x2), Sega Genesis(x2), Sega Saturn, Sega CD, Genmobile (portable Genesis), FC Twin, PSX, PS2(x2), GBA, SP, Xbox 360, N64, Showcase Arcade
5. Sonic and Knuckles
4. Sonic 2
3. Dick Tracy
2. Dr. Robotnik's Mean Bean Machine
1. Toejam and Earl: Escape from Funkatron
I prefer my 32X library.
Sega Genesis (Model 2), Sega CD, Sega 32X, SNES, Nintendo 64, Gamecube, Game Boy Family, Phillips CD-i Model 910, NES, Atari 5200, Virtual Boy, Atari Jaguar, Playstations 3-4
-Vectorman
-Sonic 2
-Sonic & Knuckles
-Comic Zone
-Golden Axe
-Streets of Rage series
-Phantasy Star
-Dr. Robotnik's Mean Bean Machine
-Rocket Knight Adventures
-Gunstar Heroes
-Batman and Robin
-X-Men
Odyssey,Vectrex,Atari 2600,5200,7800,Intellivision,Colecovision,NES,Master System,SNES,Genesis,32X,CD,CDX,Virtual Boy,TG-16,Neo-Geo AES,Jaguar+CD,PSX,PSOne,Saturn,3DO,N64,DC,PS2,Xbox,GCN,Wii,Xbox 360,PS3,GB,GB Pocket,GBC,Lynx,Game Gear,Nomad,NGPC,GBA,GBA SP,GB Micro,DS,PSP,PSP Slim,WS,WS Color,3DS,Vita,PC,iPhone,WiiU
A/V:55" Samsung 3D LED TV, Onkyo 7.1 TX-SR605 HTS My gaming collection
I love so many Genesis games. These are some of my favorites.
Sonic The Hedgehog
Sonic The Hedgehog 2
Sonic The Hedgehog 3 + Knuckles
Mickey's Castle of Illusions
Michael Jackson's Moonwalker
TMNT The Hyper Stone Heist
Vectorman
Vectorman 2
Taz In Escape From Mars
Power Rangers The Movie
Aladdin
I have a pretty small collection of Genesis games, but I enjoyed Samurai Showdown, Streets of Rage 2, Valis III, Shinobi III and Weapon Lord most of all. I hear Weapon Lord is superior on the SNES, but I've never played it.
I guess I should add Gunstar Heroes to that list, although I've never actually played it on a Genesis before.
Flashback: The Quest for Identity
Mega Turrican
Thunder Force III
Thunder Force IV
Gaiares
Musha Aleste
Shinobi III
Streets of Rage
Fatal Fury 2
Alien Soldier
Castlevania: Bloodlines
Sonic 2
Gunstar Heroes
Earthworm Jim
Tatsujin
Aero Blasters
Contra: The Hard Corps
Dick Track
Elemental Master
Phelios
Strider
Vectorman
I also like the music on most of the games as well. 
