I never had that Sega friend, all my friends started with the NES (like me) and had all the other ones too (SNES, GC, N64, ...). I guess that´s why i don´t like the old Sega consoles and love the old Nintendo consoles - because i had no one showing me some games :)
But then again, i played Sonic with an emulator and i did not like the controls. So i guess for me it was good to stick to Nintendo.
RE: Playing consoles you never owned, a.k.a your "Sega friend"