Well, I use Game Maker 7.0 as well. I like it, it works, and it's fun. Me and my little brother usually work together coding things, so it's kinda interesting to see what happens when we disagree on things. One game that we actually made and is a big big thing is Danny Dino, which is a very simple go through the dungeon, pick up upgrades, and beat enemies and bosses. We were working on a 2 player mode when we got bored.

My little brother started working on a Danny Dino 2, and that one is a platforming game which I've decided I don't like because he picked back controls. ANd then we're working on a super big Danny Dino 3, which is more like an RPG. And that one is coming along rather slowly... We also have a few other things in the works. My little brother is making a two player shooter. The jumping controls still suck and it's not very far. I've done nothing with that one except recolor his blocks to a pretty pink, just to drive him crazy.
The game I'm really working on right now is a blackjack game. I've recoded it 4 times in Game Maker. When I first made a blackjack game, it was with Visual Basic for school. It was easy and worked, so I thought could make one in Game Maker too. I was wrong. And couldn't figure out how to tell it to make a random number. So, my coding was telling it to first change the sprite and variable. Then a chance with decreasing probability to change that card to the next number. Needless to say, I got annoyed after programming that about 8 times. Then I found out how to call a random number. That cut out all the blocks from my coding, but I still had to tell it to change sprites. So, I was glad that that worked. Then, EA told me the code to change the sprites using GML. It went much much faster, and I was glad to be able to copy and paste things. Then, after I changed my coding to that, I realized how much less code there would be if I set it to a loop. So I changed that. Now my codes for it are almost done, and I seriously doubt there's a way to code it better, so I'm happy.
Anyways, I love Game Maker and am currently working on learning GML. Eventually me and my little bro will probably upgrade to Pro Edition, but for now we're happy with our pathetic attempts at coding things. Lots of big projects, lots of half finished games, but they're all fun. We just need to stop starting new things.
^_^