Encouraged to make an uber powerful oc? Yes! I always hold myself back (a bit too much) out of fear of making them into god mode gary stues. Glad I finally have an excuse to go all out.
Being a mortal that has transcended into the realm of cosmic entities (like wishing upon the SDBs, being an omega level mutant, using the Omnitrix to become a Celestialsapien, etc...), I stumble upon the MGE verse. Realizing that the powers that be are too busy screwing each other over to actually stop me from doing anything, I decide to intervene. With some fingersnaps, I weaken the order and its opression, kick out the CG and replace her with someone sane, help the DL make the world how it should be (according to her, but mostly me), give the Queen of Hearts a well deserved (non-sexual) spanking, and finally, leave a semi-mortal incarnation of myself behind to indulge in all the pleasures the world has to offer.
PS: @Aro, that sounds very surprisingly similar like an idea I once had. Namely that, should I gain those powers, I'd make a world filled with mindless constructs just to experiment. Like a computer simulation, only so much better, to have a good idea how what to use my powers for and what not.