Yeah, I would definitely encourage you to. It's clear that you've got a lot of talent/possess the skills for making graphics. For example, you can work wonders with lighting, and your effect usage is very nice. These tags are great representations of that:
Your splatter sigs are sometimes pretty messy but the latest one you posted doesn't have a hint of the messiness your older ones had.
Kudos to you for that ;-]
BUT it has been a year so I hope you remember to clean your splatter up a bit, especially around your renders, haha.
Anyway, since the graphics you have in the OP are rather outdated, I didn't give much C+C, but I am curious to see what you can do now. I'll definitely be keeping an eye out.
(Oh, and before I forget- your smudge tags are stunning. I would say that they're easily your best works. I'm pretty excited to see more of them from you in particular.)