I *love* my aqua pens. I rarely even touch blender pens anymore.
What I've learned to do is "squiggle" the pen instead of using it as a "coloring" or "writing" motion. Be random.
The other thing I would strongly encourage if you haven't done so: GET SHIMMERY WHITE CARDSTOCK. OMG, what a difference it makes over Ultra Smooth...
You can see something I did with the aqua pens in my small gallery... it's after the clock picture somewhere, using All Natural:
www.splitcoaststampers.com/go/valancy1
I hope you come to enjoy them as much as I.
One other thing... on the blender pens and chalks, don't touch the blender pens in the center of the chalk. Reserve one corner of the chalk for blender pens, as when chalks get wet, they get hard and won't render color for you.
Secondly, use Basic Black or Basic Brown ink for your outline for the aqua painters; they don't run when they get wet.
Thirdly (lol--and finally) you can also use the markers--take the brush end and scribble right on the lid of your stamp set, using it as a palette, and pick up the color from there. OR you can squeeze your inkpad when it is closed and when you open it, ink will be on the inside lid that you can draw color from that source, too.
HTH,
Debra