Traditional (budget) cube with themes designed around my favorite limited two-color archetypes.

Blue-White: Blink Value/fliers
Blue-Red: Instants and sorceries- pinging and wizards
Blue-Black: Incidental Mill/reanimator/control
Blue-Green: Flash/junk tokens
White-Red: Go wide tokens/pinatas
White-Green: Populate/enchantress
White-Black: incremental lifegain/aristocrats/clerics
Red-Black: Madness Aggro/sacrifice
Red-Green: x spells/hydras/ramp/multicolor
Green-Black: morbid/reanimation/grind

speed- Red>White>Black>Green>Blue
aggro- r/b, r/w, w/b
midrange- r/g, w/g, u/r, u/w
control- g/b, u/g, u/b