Which ones do you still use? Which do you like and dislike?
I like records. I've inherited some from my parents, the same ones I listened to as a kid, and they are priceless to me. I've also liked picking up records at flea markets. My brother gets new albums on new vinyl, but somehow that's not the same.
I am a die-hard fan of cassettes. Lots of people have made fun of me for this but those things are damn durable. I have a used car with a tape player so I got out all the tapes I hadn't listened to in a long time. They have been through years and years of abuse, and most of them still work. Also, if they don't work they can be repaired with household items like screwdrivers, scotch tape, etc.
I hate CDs. I remember when they were invented and I said they're just glorified records. Except records don't skip as much and if they do skip, you can put a dime on the needle (though that will make it wear down quicker). CDs were the first thing to never wear out, but they're so touchy and they skip at the drop of a hat. My favorite thing is when you put a disc in and it says "no disc", like a kid that says "since there is no one there, I won't respond!"
MP3s are fine, I have them on computer but don't have a portable player (I'm unemployed), eventually I'll get one and ideally I can play them and cassettes in my car, and MP3s and records at home, and hopefully never have to deal with CDs again.