@Yalow,
I wouldn't say I identify with these characters, but they tend to be my favorites. Unlike Spock, who wanted to distance his personality from humans, there are Android and non-human characters who wished to become human-like.
Data, in the Next Generation, was the answer to Spock, but unlike Spock, he wanted to be human. In Voyager you had the holographic doctor, and in Deep Space Nine, you had Odo. All of these characters wanted to become human or at least become like humans. And in the science fiction comedy series, Red Dwarf, the Android Kryten, more than anything wanted to become human. This desire to become human is what made them sympathetic characters.
Spock was just the opposite, and I didn't find him to be a particularly sympathetic character. He was more like a human who wanted to become a computer. But at the time of that Star Trek series, that was interesting and different.