Some people you just can't make happy. They will find anything to complain about and then go on and continue playing the games they claim to be not up to par.
As far as playing games from other companies, I highly doubt Blizzard will care, as nearly everyone that plays a Blizzard game will always come back for more, because they are flat out better than every other game out there. (There is no such thing as a perfect game so keep buying other games from other companies and you'll find you lose interest within weeks or months with them compared to the months and years it takes with Blizzards games)
How many non-blizzard games have you played for months or even years at a time? Yeah they are out there, but they are far and few between, because they can't hold a light to the qaulity of games that Blizzard continues to put out! :)
always come back for more? i havent touched diablo 3 since 1.04 came out.
i havent played wow since lich king.
i havent played star craft since sc2 came out, and i dont plan on getting the wrath of the swarm.
older games from blizzard? ill always go back to them.
games ive played for years, and games i will be playing for years that arent blizzard games:
final fantasy 6 and 7
dragon warrior (any of them)
breath of fire 1, 2, and 3
elder scrolls 3: marrowind
mk 3 and 9
kingdoms of amalur: reckoning
tales of symphonia
super street fighter 2
star ocean series
super mario rpg
torchlight 1 and 2
path of exile
command and conquer
magic: the gathering
age of empires
sometimes fan boys are just full of !@#$, and have no idea what they are talking about. someone should make a video like they did for "things apple users say", they should make one about, "things blizzard fan boys say". because you are just so full of s h i t.