I've finished Botanicula now. It's shorter (I think) and easier than Machinarium, and I think I prefer Machinarium overall, but I enjoyed the experience. It just inspires this kind of sense of wonder - somehow makes you want to play with and investigate everything.
I also played through Crayon Physics Deluxe recently - I got it a couple of years ago, but never finished it, so I just started again. And I'm not sure why it took so long, but I tried Super Crate Box. Very fun, and easy to get sucked into.