Yes, there's millions of suns and planets out there that aren't in our Solar System. I've always wondered what they looked like, would they look and do things like us, or do they ride dinosaurs and have three legs, the world may never know. :)
I tend to doubt it. However...I do think there is a possibility of eventual discovery of more fundamental or "lower" life forms on another planet, especially plant-like life. I would be curious myself to find out what kind of "cooties" might be on Mars.