Never really gotten into this and not sure where to start on dribbble lol. If anyone follows any good designers for this that they would recommend, I'd appreciate it.
has daily submissions of UI design. Falls on the side of conceptual rather than practical, which is good for inspiration and ideas
Nice article on UI motion here that might help your research:
I don't follow any mobile-specific designers but check out Green Chameleon (dribbble.com/greenchameleon) for some nicely designed/animated UI. Also hoverstat.es is a great site for good interaction reference.