I really like the Canon Powershot G series cameras.

Good resolution. Lots of features. Common interface with other Canon cameras. The rear display is fully articulated so that you can easily take shots above your head, below your knees or "selfies". They also have (non-electronic) viewfinders which I find is a must-have - just not while flying!

I own a G12 which is no longer being sold but can be found on eBay. The G15 and G16 are direct replacements.

- John