Alright, this makes me wanna cry<3 Let's see if we can get through this without my breaking my keyboard from tears.
First, I love your style. It's very simple and complex at the same time. I also love how you made the Rose-y background reflect on Rose and the Doctor's faces, but it does look a little strange to have that reflection with flat colouring ^^
This isn't something that I've seen floating all around deviantART, so five points for originality.
Five for impact, because I just looked at it again and a tear slid down my face :')
All in all, fabulous piece of work. I need to check out your gallery in hopes of more like this!
First off: dem feels... they broken ;_; This is beautiful!! The technique is very pleasing to the eye, and if you are a dithering fangirl, (like me) i guaranty maybe a tear or two.... Or million.
ROSE: i love the way you did her hair. Its a little messy, which is how it was in that scene. You got her face proportions quite nicely, which is actually rather hard. The little bit of her jacket behind her a lovely touch! She really looks sad. You captured it in a heartbreaking manner. The slightly raised eyebrow is also a nice touch, and that, along with her half lidded eye gives her a lot of emotion. And the hand on The Doctor's shirt.... wonderful! <3
THE DOCTOR: His hair.... *v* The expression on his face makes it obvious how much he loves Rose. That caring look tinged with sadness, but a love so strong he gave up his human self so Rose would be happy. The only thing i would change is his eye. it looks a little small, but thats just me. You really got the eye contact between them, which is tricky at times.
OVERALL PIECE: this is extraordinary! i would buy this as a poster, and if i got my way, the words "Rose Tyler, I Love You". that would make me happy beyond words.
Keep drawing! you have a talent you should be proud of!!