I love building puzzle decks and cubes, i played magic since i was 10, my cubes are a challenge for expert players, powered down to a worse than pauper power level, you'll need to figure out how your favourite way to play is.
Cubes are super budget tho, cause i'm still an undergrad.
I try to reproduce wotc's draft experiences, withouth the value of the card being a problem and the need to support multiple formats every new set.