Personally i prefer the PSP over the DS because i played it to the point of it being worn out and having to go buy a new one. DS is fun and all but i got tired of most of the games having too much to do with the touch screen, the official online play was fun for a bit too until a bunch of cheaters came. There aren't as many great games for the PSP but so far my favorite has been the monster hunter games. I put around 475 hours on part 1 and 300 on part 2, which is why the thing got worn out in the first place. The great drawback on PSPs is there is no official online play, but you can still play online with other people through the use of tunneling programs if you care to go through the trouble. I tried out xlink kai and i have to say, monster hunter online was great, not many cheaters and even if there were, they werent much of a problem as its only one quest and you'll end up doing hundreds. Can't wait until monster hunter 3 comes out on wii!