congrats ! ur suddenly turned into your fursona/dollsona/idealized form/whatever.
what's the worst part? what's the really annoying part you're like "well obv this is the greatest thing but i wish i had realized how annoying X would be"
(this is assuming no one is weird about you suddenly being a dog or whatever; purely "what's the worst Practical part of your impossible idealized form?)
Parts breaking, keeping myself charged, maintenance.
If instead of the robot, the raccoon? Gotta get a bunch of new shoes and the tail situation is gonna be tricky with pants I suppose