How do you feel about old games?

It's interesting to hear people's opinions on this. What do you think, is it worth wasting time on old platforms and games or there are so many new games coming out now that there is no time and desire for them? And another interesting point - do you play the first game of any major series (for example, Tomb Raider, The Elder Scrolls), before passing the new ones, or immediately proceed to their modern versions? Thanks in advance.