What do you think about aliens?

[vulcanlogician]

Yeah... are you joking, GGG? I can't tell.

If you aren't, what's your rationale for assuming intelligent life would have humanoid form?

I can ask same question,  what's your rationale for assuming intelligent life would not have humanoid form?

Because the evolutionary conditions on other planets may be far different from ours. It stands to reason that life that evolves on a planet that doesn't resemble earth will similarly not resemble earth life.

And even if it's an earth-like planet... 

We evolved from apes who lived in trees. So we are lanky, we have hands that can grab branches, etc. We can't assume that all intelligent life MUST evolve from tree-dwelling species. And if they DON'T, then they will end up looking much differently than us-- that is to say-- not humanoid.