This is my cube list, originally based off Jim Davis's Cube. It has not been updated for several years so it does need a fair amount work.
The main idea is to have powerful build around cards like Upheaval and Memory Jar, but with limited amounts of fast mana and strong disruptive aggressive decks to keep everyone honest.
White is almost exclusively aggressive with low to the ground creatures and tops out with Tangled Wire and Armageddon.
In aggressive decks Blue is mostly a supporting color for the affinity deck, while higher in the curve Blue provides the tools for all sorts of non-sense.
Black also has an aggressive package of creatures along with lots of cards to support a variety of other subthemes, including: Control, Reanimator, Storm, Graveyard Loam, and Stax.
The red deck is less of a standard burn deck and more of a go wide deck, but I feel it needs work. The top end supports some light combo decks with Kiki and Sneak Attack
Green is predictably focused on ramp, but also supports zoo, coco, and land decks.
Among the 71 colorless cards there is, as previously mentioned, a strong aggressive artifact deck, as well a limited number for mana rocks and high end finishers such as Karn and Emrakul.
The cube has 83 lands (not including lands that don't tap for mana) with 5 duel cycles and a cycle of colorless lands.