I must stress that I am neither a scientist nor an alien, I have no inside knowledge.
I am just a girl with a heart full of hope that one day within my lifetime we'll send a little drilling robot to the surface of Jupiter's best moon, and it will find some little bacterial guys and therefore at some point before I die I will see alien life.
@girlonthenet I hope you're right, but I can imagine a lot of reasons how carbon would be there without life, too. Venus, Mars, Uranus, and Neptune all have significant amounts of carbon.
But if there is life, what I'm most curious about is whether it's similar to our own. Like, does it even have DNA, or does it use some other mechanism. If it's similar, does that point to interplanetary cross-pollination or does it indicate convergence on something similar to what we've got here.