What was old is new

For some strange reason, I've been gravitating to old games recently. To clarify, I do have plenty of current games to play but for some reason I feel drawn to either re-start or complete games I started years ago. For example, yesterday I just completed "Syphon Filter: Logan's Shodow" for the Sony PSP. I've had the game for over a year. Last year whilst playing I got hung up on a level. I didn't check GameFaqs or anything else - I just gave up. The same thing is kinda happening with Metroid-Prime Hunters for the Nintendo DS. Love the game but also got stuck and gave up. Now, I'm not what you call a "hard-core" gamer but I do own a lot of games and game systems. I just tend to play them causally.

So, does anyone else out there do what I do? Do you ever pick up older games or do you simply sell them/trade the game when you're tired of it?