The main characteristics of watercolor image include a semi-translucent color, an unevenness of the “brush strokes”, and often fading edges instead of definite ones. Let's see how you can recreate that effect with PaintShop Pro.
watercolor
Dual effect on a photo with PaintShop Pro
Sometimes, you can't decide what effect you want to showcase for your photo. Why not display two or more of them? That could be a creative way to show off your work, or sometimes, to hide some defects.