Serious reply: Ever since I was little, I always rooted for the underdog. I was born with a birth defect that took my right eye from me and was basically an outcast all through gradeschool since it was physically obvious (I still had my eye, but it never grew fully, and it had a huge cyst behind it that kind of peeked over and under). I guess this just made me always feel for the last man out. Half the time, I like the villain of any given fandom not because being bad is sexy, but because there's usually some underlying reason for them being the "bad guy" that I can relate with to varying degrees. I like the unknown, that which is different.
I can relate to the geth a little in this way, turning out to not be what they were supposed to be and being faulted for it to no action of their own. In gradeschool, whenever I finally had enough of the teasing and bullying, I'd finally lash out, and I was always the one who got in trouble, never the other kids. One of my teachers told my mother at a PT converence that I just had to grow up faster than everyone else. Through no fault of my own, I was forced into a role I never wanted, instead being made to do what I had to to "survive" in that enviroment even though I'd rather have the whole situation not come about in the first place. Even though I had corrective surgeries at the age of seven, that followed me throughout school to graduation--I was never truly accepted by my peers because I had been different and I'd always be different.
Non-serious reply: