Hey everyone, I'm CML. I used to write for TCGPlayer (
http://magic.tcgplayer.com/db/article_search_result.asp?author=Christopher%20Morris-Lent) and SCG; I may even still write for SCG, though since I'm lazy, I'm not sure. I am proud to live in Seattle, because it lets me drink while playing live
MTG, has a nice community, and gives me an excuse to not win PTQs.
I built my Cube about a year ago due to the rising price of hosting a weekly Classic draft. Like you, I played when I was a kid, then took a break for 10 years, coming back in SOM because its release coincided with the death of online poker and I was depressed and needed something to do that involved playing cards on the Internet -- but I do remember the days when RGD cost like $12 per head!
I love drafting old formats, and I agree with Jason that Cube should explore the best design principles in Magic. Old sets inform Cube design by embodying these principles and acquainting you with obscure cards. I play every constructed format and like to brew, especially in Modern -- I find Magic boring when it lacks the original and creative element -- so my favorite format for designing is Cube. Cube also solves all the intrinsic problems of casual play (that EDH exemplifies), though I've also written about Pauper EDH. Pauper EDH was, like most of my ideas, an idea a friend had first, and as a brewer and Cube designer I benefit greatly from the ideas of others (all good brewers net-deck more than net-deckers); for Cube I'm grateful for the honest feedback and good taste of my play-group.
Competitive play also informs Cube design. My proudest achievements are my Cube, and a third-place finish in an online PTQ with my own Wb Martyr list. The two are inextricable from one another. Tournaments teach me a lot about constrained optimization, card evaluation, and deck design; Cube encourages me to look more deeply at what is possible in Constructed. Having played all the formats, Modern and Legacy can be very skill-testing, but Cube is the most difficult format of all. Much of the point of Cube is having good players fuck up. Otherwise, this game would be boring.
I like lots of fixing, multi-color aggro, a flattened power curve, a lack of tribal cards (except for Humans!), decks that do everything poorly, synergy over power, Eventide cards, and the four Squadron Hawks I crammed into a single sleeve. I'm grateful to Jason for starting this group and carrying the torch with his CFB articles. Cube is rich and interesting and teaches us a lot about ourselves inside and outside MTG. I hope I can help other people discover that kind of joy.