It's a good thing to do. I do that every once in a while...play a lick in all 12 keys. Kinda fun to throw in stuff like "Salt Peanuts" or "Sandu" into solos and just run up a few scale degrees with those licks. People think you're a genius.
Best way to do this is to go around the circle to the flat side (up a fourth, up a fourth, etc.) rather than up by half steps as it forces you to use your ear more rather than doing it mathematically . . .