So I picked up the latest Humble Bundle, with the bit extra to get bundle 2 as well. There's nothing here I was really amazingly excited for - I can't remember if I actually bought Crayon Physics Deluxe when it first came out or just played the demo until I got bored, a slider puzzle is still a slider puzzle even if it's got a lot of bells and whistles, pseudo-retro-platformers are fun but I wasn't desperate for one, and I still don't know what hammerfight IS yet.
I have, however, become quite fond of And Yet It Moves. I feel free to play around and explore the game a little... there's not only one exact way to do things, and the save points are very frequent so I never have to worry about losing too much progress. I did have to consult the internet to figure out what to do about the beehive, though, and the windmill bat-tree was suprisingly scary in some weird way (That's as far as I've gone so far). In classic tricky platformer tradition, of course, I sometimes JUST BARELY miss something and end up yelling at my computer... and then trying again. :)
I guess the difference is that VVVVVV is too tightly focused on its puzzles. It feels very driven - get past this, get to the next point, keep moving, keep moving! It doesn't feel like there's any entertainment to be had from just fooling around, and that makes the whole experience less relaxing.