Mostly it's one of the most pure RPG experiences in terms of strategy, planning and overall thought that goes behind setting up the perfect team (of your choice). There isn't another game or series that has a meta game as huge as the Pokemon games have.
That, and the whole Catch em all concept are the driving forces behind the series for me. Pokemon White&Black added some nifty concepts, like re-usable TM's (does wonders for strategies on the go), the new 1 vs 1 PVP item system (no more abusing Full Restores left and right) and the larger focus on story this time around.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
