[bluedays]

What about paint.net is drawing you in from windows

[GartzenDeHaes]

There's almost no learning curve if you know Photoshop versions 6.0 - CS6. From this point of view, Pinta has a bit of a learning curve, or maybe there's some bugs, or maybe it doesn't like my system colors. It also seems (not sure) to lack common brush and tool settings, although maybe it draws differently than PS.

[yodon]

Simple easy UI and enough capabilities to accomplish the occasional manual image editing tasks I need as a dev, in a free and open source tool.

[haunter]

>in a free and open source tool

It’s not open source for more than 15 years. The last FOSS version was released in 2009 November

[marwis]

It's not open source and hasn't been in a very long time.

Still very useful though.