I don't let anyone call me by any of the nicknames for my name (Richard), because I don't like them. But in IRC we call our handles 'nicknames', and here are some of the IRC nicks I've used and some of them might have been handles from other platforms as well.

Inhahe, ColorStorm, AirCastle, ikiel, Ayiel, iyael, iyaelorai, iyaelsorai, sikelogic, The, Repne Scasb, eode, eode-apoa, asadasafa, overdork, exalumen, prism_attic, Chris Alice, Arco Iris Gotico, gothic_rainbow, sloppyalienabduction, spacedust, sarcasmos, twilighteyed, tenderStorm, O11O1OO1, paramoven, pancreant, myriachromat, metarogue, Merq, lonelydream, lunarrain, ikiellumani, i_see_stars, ilyarien, icetears, ColdFire, anoetic, cerulean, Buddhaha, Beyondo, Godlust, LuMaNi, lumani, TheSwordsInTheTone, Wonko_the_Sane, WaveGuide, \psychic_almonds\, FiberSuck, _2adore, adores, abraxas, abtensile, acausal, acuteangl, anomalon, confusicon, antisceptic, DAEDALUS, fakeId, flying_caterpillars, peanutbutterflies, white_crayon, strayhair, stainedglass, revolving_monastary, sad-powered purple prism, wWw NrGC wWw, themissingsocks, rainbowice, post_hoc_reifier, picaflor, nfi, icecastle, cropcircle, caerien, avien, avian, aqua^mage, Andy Warhol's Hair, deep_sea_creature, Qntm_Hckr, tesseract, Titania, omfg, holycow, defence_mechanism, disenchanted, dreaminwake, dreamwalker, free_radical, hiimrertarded, neveroddoreven, kavorka, ElementaR, aDdlouSe, casionic