I used to primarily use colored pencil with a tiny bit of digital. BTW, Prismacolors are THE best. When I first decided to try using colored pencils, I went for them first-off and was spoiled from the getgo. I tried others as they were a littlle easier on the pocket book . . . but then went back.
Then this workhorse of an illustrator and another workhorse friend (who uses digital but produces a heckuvalot) convinced me to try water color washes under my pencils. I got some watercolors . . . good ones . . . and some good brushes too. They sat for a couple weeks. Then I considered the similarities between rendering with the Prismacolors and watercolors . . . there are quite a bit, with light source and opacity to name a couple. So I tried them. Working with both mediums is making my time with the art all the more fun and timesaving. If something is drastically wrong, I can fix it in Photoshop, for the most part.
Most of the illustrators I know use digital, if not for rendering their entire scenes, it's used for enhancements and clean-up.