Web appropriate, flat logo, suitable for vector format, over nice blurry background. Simple elements, no clutter. But not just another anonymous design. I think its the brand personality, the little rocket and the name "rocky" that makes it.
Email UI design!
10 Design Principles via CodeAcademy.com 1) Aim for a single-column layout. 2) Social Proof: Leverage Testimonials 3) Use color sparingly and associate it w/ specific actions. 4) Fewer Form Fields 5) Reduce Calls-to-Action 6) Content First. Chrome (Actionable UI Elements) Second. 7) Hierarchy. Let type, color and white space rule. 8) Incorporate easily recognizable icons and means to let users know where they left off. 9) Bigger Buttons. 10) Welcome, even when there's no data to show.