WoW for me is crap, I hate faction system, i hate quest chains, i hate instanced pvp and "end game" stuff. WoW died for me after Lich King -> Cataclysm and never came back. I'm an old school MMO player who prefer open world based MMOs like Lineage/Everquest/Tibia/UO(old days).
Overwatch is overrated, Ureal tournament still is the best arena shooter out there.
I don't like RTS games, therefore I can't comment about Starcraft.
DOTA 2 is a much better moba than HOTS.
The only game from Blizzard I enjoy 100% is Diablo but D3 is not exactly the Diablo 2 sequel I wanted.