I voted Psuedo Mono, though I don't quite match OP's definition for it. I do tend to concentrate on one 'major' title at a time, and devote the vast bulk of my play-time to it. I might or might not play any of several 'simple' games simultaneously. I do, however, rotate between the few major titles residing on my hard drive (or rather SSD), those at the moment being modded Oblivion, Daggerfall and Minecraft. What I do is play one of those three almost exclusively for some time, then switch to one of the others and do the same. I most definitely am NOT a Poly-Gamist. Heck, since 2009 I've bought only these titles: PC GOTY Obiivion (2009), PC Minecraft (2012), PC Skyrim sans DLC (2012), Banished (soon after launch), Wizardry 6 & 7 at GoG (2014, not yet played), Elder Scrolls Anthology for its Morrowind and Skyrim DLC/expansions (2014, not yet installed). I might have forgotten something, but doubt it. Oh . . . seems to me I earned a free copy of Mount and Blade from GoG but have not yet bothered to DL it. A few other titles tempt me, such as Timber & Stone and Cities Skylines, but I do not at this time seriously consider acquiring them.