So far I'm the only one that's commented about other. I use water color crayons. You just draw on a pallet with them, then use water to make it into paint. You can also use them like the pencils. You can draw on your paper and then get them wet.
Here's a pic. (and these are the actual brand I use) - - -> [link]
Such a purist You should experiment with liquid watercolors, actually. They require a somewhat different working method than pans, but they also offer different results. I use inks actually, and I like the fact that they dry faster and offer the possibility to create areas of flat colour very easily. The fun part is when you learn to combine all your tools to get interesting effects (at least for me).
Tube watercolors generally offer the most intense pigments for mixing, and the widest range of prepared colors. That said, I like all of these except gouache. Pans are great for outdoor sketching and travel. I've used the liquid paints a bit for coloring or highlighting pen and ink drawings and they are great for that. I'm not sure I'd use them for an entire painting though. I'm just starting to explore the pencils. Gouache feels more like oils to me, because of the opacity, and I'd rather just use oil paints if I were going in that direction.
I use mostly watercoloured pencils, but I've broken into pan watercolours. I've got a few in tube form, but I haven't really experimented with them too much. I really wanna get into goauche though. ^_^
Gouache is water soluble but opaque where watercolor is largely transparent. The two can be used together but they give a different effect and require somewhat different skills in designing and laying down the paint.
Pan colours. Though I like to use ink, pencil and gel pen, too, in a same work to create lines and at times textures. At times even acrylic colours mixed with water but other types of watercolours I haven't had a change to try.
Some day I would like to try goauche and tube/liquid watercolours. n_____n
I use a little bit of everything on a piece. I use pencils (Prismacolor)if I want a certain texture like for trees or grass. When I want a very light wash, like for a sky, background, or when I am creating flames I like semi-wet pan (Prang, normally). For the center of the piece or when I need a really obnoxious color, tube (cheap off brand), definitely. Not a big fan of liquid, and I've not used Gouache. I'll have to try that. :3 I don't think I'd suggest this method to anyone but cartoonists. XD If there's a reason I'm not terribly good with them, it might be this.
I have a field-set, i.e. a box with pans for out-door work/ sketching. But for my "real" paintings I use (artist grade) tube paints. Most of my paintings are rather big, and using tube colours I can quickly squeeze out just the right amount of nice "juicy" colour. I also find tubes better for keeping colours clean/ separate from each other. With pans, I find it very hard to prevent "cross-contamination".
I love trying out new stuff, so I bought some watercolour pencils a while back. Found them disappointing, but maybe they are just not suited to my way of painting.
I love my pan watercolours......[blocx & w&n mostly]but I also have a whole box of tubes for specific projects[w&n,art spectrum]....and I love watercolour pencils[derwent,faber-castell],for details and portability]