The 40k Universe, of course! I mean, there's a ~1/1,000,000,00 chance of becoming a nigh-unstoppable genetically engineered superman; a ~1/10000 chance of surviving for several centuries; a 1/10 chance that your soul will be consumed by a mind-melting horror from beyond the veil of space and time; a 1/1000000 chance of becoming corrupted by the pure esscences of pain, rage, plague, and confusion; a 1/100000000 chance of becoming an immortal indestructible demonic monster with three heads, nine tails, eight arms, four hooves, ~twenty tongues, and a constantly shifting number of tentacles; a 1/100000Xradiation/planetary birth rate of being a powerful psychic commando; and a 1/1(10) chance of seeing your eightieth birthday!
I mean, how can you resist those odds?