Everyone's art style evolves over time, and sometimes we try something new that just works out and we run with it. I think that's where I'm going with the style I've been using most recently, with sketch and line done on the same layer and copious use of the eraser to make heavy, sketchy-looking lines. I'm still experimenting with it, really... some pieces are more polished than others and I still haven't gotten down exactly how I want to treat color. I'm enjoying the monochrome pieces at the moment (Tumblr probably knows better than DA that I usually do, since I post more frequently there), but since I'm using these pieces as warmups and cooldowns, I'll probably end up settling the color thing soon.
I think that the thing I enjoy about it is the fluidity of the lines and the lack of perfection there ... I find lineless rendering fairly tedious but was never really comfortable with smooth, slender, precise line work. I can do it, but it's not the thing I enjoy ... pencil sketching is still among my true loves, and with doing the lines the way I've started to, I feel like I can preserve the energy and gesture of my sketches the way I never could when inking.