That mode seemed to work out really well for you... I would keep using that...
Color mode is great for starting the colorization, but Overlay, Soft Light, and Hard Light are great for adding accents on top of that. You can even use a little bit of Color Dodge or Linear Dodge to enhance the colors, but be subtle.
Some people absolutely love painting in black-and-white and then colorizing, but I personally prefer to either paint black-and-white or paint directly in color. I understand the advantages of the colorizing method, but I like the simplicity of just working either in B+W or color straight through.
I asked this very question several weeks ago in the Paintover Thread, and learned several methods, most involving layer modes.
You could mess with Multiply (which makes white areas transparent, so you get full color in the white, greys are darkened, and black is black), Screen (makes black areas transparent, the reverse of Multiply), or Overlay (makes 50% grey transparent, the middleground of Multiply & Screen).
You could put the greyscale image into Luminosity mode and color under it. This achieves the exact same results as making Color mode layers on top of the greyscale image.
Or, my favorite method, is to use the Channels. JLAlfaro explained it better than I could, so I'll just copy him...
However, it's up to you whatever works best. Like others said, using color mode worked out pretty damn good for you. There isn't really a 'best' way, except in the sense that certain methods may be the 'best' for you personally.Originally Posted by JLAlfaro
-My work can be found at my local directory thread.
easy with the saturation there, Tonto. Remember--> Refined subtlety is of great importance with all good art. As is, it's looking better in greyscale mode... seems more intimate. The colors you are choosing make it seem definitely photoreffed and slightly clumsy. then again, color is a pain in the rear so i feel ya on how difficult it is to choose them--> i'm notoriously bad about it.
Definitely keep expirementing there are tons of different methods and tutorials you can find on this site if you dig around a little bit.