TI, don't look now, but the name of site is (and has always been) "From Bricks to Bothans." Nowhere in there does it say anything about LEGO explicitly, and given that Mega Bloks make "bricks" as well, the title would still be appropriate. However, given your provenly-appropriate username, I'll let it slide.
Now, I do remember getting some Mega Blocks from a relative as a kid. At the time, I didn't even realize they weren't LEGO (they were all LEGO to me). However, I do remember that their clutching power quite wasn't as good (they had a tendency to fall apart or not quite line up when they should). However, that didn't prevent me from playing with them and having fun.
I do find certain people's attitudes about Mega Bloks to be pretentious, much like the people from Harvard who snub their noses at those from Brown. Not everyone has the same means as you, and for many Mega Bloks is all they can afford. I took a quick stroll over to the Mega Bloks site just to see what they had and what their price ranges were. I have to say their prices are much more economical than LEGO's and in a lot of cases have better price/part ratio than LEGO. Of course, I do think their Dragons line is about the most worthless think ever, but even given my known and well-documented history of Halo hatred, I have to admit that their sets didn't look half bad (although their figs make the clonies look downright gorgeous). Their Probuilders line also shows some good signs of potential.
What will happen if, heaven forbid, Mega Blok's quality someday rivals LEGO's? Will your whole world come crashing down around you? Or will life go on, attitudes adjust, predjudices be forgotten, and balance be restored to the force? I'm betting on the former.