I am a 61 year old gamer. Drake's Fortune is GREAT! The graphics are fantastic, and it is part shooter, part puzzle solving. And yes, you can find walkthroughs on the web that you can download, or copy/paste, for free to give you a hint of what to do next when you hit that stumped part. Just Google the name of the game followed by Walkthrough to find them.
Motorstorm has some neat graphics, but is hard and requires faster reflexes. My 10 year old grandson goes through it like crazy .. it's all I can do to stay on course ... or even figure out where the damn course is
I also fell in love with Assassin's Creed. The storyline is great, and the game much more realistic than most. It follows history to some degree. Your weapons are your fists, a longblade, a shortblade, and throwing knives. That is a really nice touch ... no magic involved, no heavy duty dream machine guns in the middle ages. The scenery is also fantastic. You walk around 3 ancient cities. Jerusalem in the game looks exactly like photos taken of old Jerusalem you'll find on the web.
I was surprised by Grand Theft Auto 4. The graphics are not the best, but the game itself is actually fun playing. I was a bit leary about it at first, but after renting it, had to keep going. It's neat that it is a wide open game. You do have tasks to complete, but can spend time just wandering around doing your own thing ... playing 8 Ball, taking your cousin or your girlfriend bowling or shooting darts.
One big suggestion, other than downloading demos, which is a great way of trying games out on a limited but free basis ... RENT. Blockbuster Video, Hollywood Video ... you can rent a game for a few dollars for a few days and really see what the full version is like ... too tough, or fun and not that bad for your level of reflexes and style. There are also a couple of online rental clubs, like Gamefly.com, where for less than $20/month you can continually try different games.