Several years ago Ive read an interview with one of the prominent Polish authors and gaming popularizers who started writing for first magazines which apeared in 80-ies. He was asked what was so fascinating in computer games that people relatively old for today's standards (usually in their thirties) had been so fascinated with them. He answered quite originally. People who played old text adventures, rpgs, puzzlers or hex-based war strategies (but also platformers and arcades) were also fans of crosswords, charades, card games, chess and other boardgames, usually were keen book readers and fans of amateur sport. They liked to compete on friendly basis and liked mind challenges. At least that's how it was in Poland then, according to him.
Online games today, especially multiplayers, but not only, present different approach imo, in both aspects. They usually promote blatant hostility and play on modern kids' thoughtlessness. You dont need to install the game. You dont need to play with settings. Dont care about hard disk space. All you need to play are cursor keys and space. There are no challenges in our game. No artificial puzzles. No surprises. Go and kill your opponent. One click of the mouse and you're one level higher. Wowsers. And see how easy it is to create your own kingdom. Just 5 clicks and you're someone else. 5 clicks more and you're on your own quest. Wowsers. Welcome Junk Teen number 1,996,574, in our mindless fun world. Forget there was anything else.
Virtual Reality 2.0? Maybe I should replace my hard disk with faster internet connection?
Naturally i like the games you can store locally, better than the ones where you're dependent on a connection to a specific site to play.
collecting only quality browser and mmo games. Someday in 2038 for example. 
