I encourage you to. Pixel art is something awesome.
If you'd like to generally work on your skills in pixel art then working with any other kind of art helps to develop It and a lot of practice of course is needed on the way.
You can check for Pixel_Dailies on Twitter, that's a project that encourages to pixel every day by posting a theme for each day. Also Saturday is almost always a study day for you to study some other artist. :]