Of course, color IS the thing, typically. It's good and professional. However... I actually feel like this story has a more developed "personality" overall in just black & white--it makes it feel different from just any other story. Especially because here on the western front most comics are in color, so it actually isn't that special. On the other hand, the B&W looks so original, and with the particular way you shade everything in that way, it really gives the drawings depth--I don't feel like it's missing color at all.
I can definitely relate to the feeling, but I think it's something we can both push through if we practice it (coloring) enough. Heck, I think you've practiced it enough, but nothing builds confidence like continuous practice! Go ahead and do what you feel will work best for the story. I can't wait to see how it goes.
I like what manga has going, where it is all B & W and parts like covers and others select few are colored.
ToniBabelony has it right, you should find your balance. Yes, the comic is for the audience, but if you do not enjoy your work it will show in what you produce. Meaning, if you do not like coloring every page, it will show in one fashion or another.
What might be an interesting touch is coloring select parts of each page and leave the rest in b&w/sepia.
The color looks great! I do understand the purity of a black and white image, and if V for Vendetta hadn't been done in that awful color, I probably would have read it by now. HOWEVER, I think the color you've done is very tasteful and brings a nice element of life to the page. Some of the non-character items such as the coffee cans and parts of the kitchen had (for my taste) a little too much detail in the realistic shading and can be a little bit of an eye trap for me. But the characters look amazing! Of course I do love the grayscale pages as well, and perhaps the color wouldn't be so special if it was used too often?