Ariadne thinks her breaking point and what made her seal the deal to return, hours after her first meeting Cobb—and getting stabbed, was the regular brag-fest with her Architect student friends at the café. Yes, there wasn't much life outside of a college students life—much less an architect students, so they got their jollies where they could. They rewarded the person with the most comfy nest under the worktable with drinks for goodness sake (it was sad Ariadne knew). It was after Cord—her neighboring worktable in Prison (what they called the Architect school) commented on the world… "Wow! Does the world look yellow and fuzzy to you?"
It wasn't even ten minutes past, before Ariadne realized her feet were taking in her to the closest taxi.
It was better not to tell Cobb or Arthur that the actual reason she returned to their ramshackle headquarters was not that she pulled in by the intellectual appeal and limitless creation. No, if anything, those were just icing to the cake…and the sprinkles if you would. Ariadne had a much more poignant reason, one that only true architecture students could only relate.
Sleep.
An architecture student's dream beyond the drafting papers and computer models consisted of hours and hours of sleep. Maybe it seemed shallow and incredibly crazy (hence the reason she let Cobb assume whatever reasons for her return), but it was the truth. But fuck, she was tired of having to replace another backup alarm clock—she had broken her last one against Cord's stupid model of Pamela Lee Anderson ("NO! Her beautiful boobies! Ariadne, how could you?")
If there was an opportunity of sleeping in an actual bed instead of cocoons of blankets under her worktable and not having to live off massive amounts of coffee (Ariadne was sure that she bled the substance by now). She would take it by the balls and make it her bitch.
There's nothing quite like a full eight hours of sleep. "It's pure creation." In dreamland.