Morrowind and Oblivion are my all-time favorite games. I cannot play Bioware's claustrophobically linear games. I also can't play the Witcher or Gothic series for a number of reasons, but mainly because I only play games that allow me to make my own character (that's essential to roleplaying, in my opinion).
There is no other series like the Elder Scrolls series for me. No other game company makes games that I can even
finish, much less play twice. Much less continue playing for years. Bethesda is the only one.