I'm completely with you on this one, Jim.
I'm thoroughly a fan of the Alien Quadrilogy, front to back, each film for its own reasons. If you go on to defend any of the AVP's, however, I'll draw the line there and I'll say so, godammit. [nudge, lol]
I also recognized the humor in the movie right away. I didn't think anybody could watch a man use a breathalizer to open a door and still expect "serious sci-fi horror".
Even though I was extremely weirded out by it, mostly the final act, that's part of why I like it so much. One thing I've always respected most about the series is that each film has its own style. After the first film went horror, the second went action, and the third went dramatic, I was happy that the fourth didn't try to retread any of those. I'm actually still sad that they never made a fifth. Regardless of what style they would have chosen to go with, it still feels like the story is incomplete, and judging from where the narrative left us off, the final film would have to involve Ripley actually becoming the Alien to bring it full circle and unify the series.
"You've been in my life so long, I can't remember anything else."
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Also, surprised you didn't mention that Ripley's no-look swish wasn't a special effect.