Hmmmm, as a DM i hated giving out wishes. As a vicious and generally malevolent bastard, i took great pleasure at twisting wishes into terrible things. My mate is even better at doing that. But as a PC i only ever wished for easy things like more strength or intelligence....the latter once back fired as a got turned into an illithid and all memory of my existence as a human removed. My party ganked me
Be very wary about what you wish for and bribe the DM with many noms before hand is my recommendation
I'm roleplaying D&D 5th with minis from everywhere, old minis from Warhammer quest and old edition of minis of wizards of the coast, I'll try to run adventures with the rigth history for each NPC