If you just want old download a SNES emulator and one of those 1-2 GB torrents of every SNES game ever and just start going down the list alphabetically. I'm sure most of it will be crap, but you will eventually come across some goods one you never heard of. Make it a blog series and post when you find good ones.
A lot of the games on GoG are great for this. You named some of the better ones. What you must keep in mind when doing this is to be patient, and don't be afraid of really reading through the manual first. I find that some old games aren't that easy to get into these days by the simple fact that the UI is... well, garbage.
Oh, and if you want another great game you really should try, buy Outcast from GoG. It is amazing.
Though they are a little harder to get into you could try the Ultima series. The first one has time travel and the third one has a crazy A.I. Though the fifth and sixth games are supposed to be the best I think.
I only played through the first and the seventh one.
@Pr1mus: Have you tried a new hobby to fill the gaps? I'm into guitar and gaming. There are times when I make some breakthroughs learning new stuff on guitar and I'll wake up one morning and not be interested in playing for months. I always go back to playing guitar I just need a break. Same with gaming, I just finished a long pause in my gaming. I'd spend every minute on my 360 watching netflix but I'm back to playing games. Any chance you just need a break?