For your interest, a search for all threads with the term organ in the title.
That should give you the requisite background on the importance of organs.
So which is it? Your fav? I suppose an organ system (like the hematopoetic system; it’s fair game too) is acceptable as well.
I have a fav, but I won’t name it just yet.
I really like skin.
I’ve always enjoyed a well-played Wurlitzer.
What?
Oh. Nevermind! 
Feh. I just HOPE you are not talking about one of those home-version Wurlitzers. Nah, gimme a good theatre pipe organ anyday. Nothing like a Bombard 16 pedal throbbing under your toes, a Great to Pedal 8 and the Subbass 16 undulating throughout your whole body, while the Tibia Clausa and a Diapason wrack and swell, and to top it off, the Vox Humana tickling the inner ear, echoing through your brain, and sending pleasurous shivers down your spine. Ah, the music ends far too soon. And don’t even get me started on the Enchamade (with spun flared ends, of course).
I really, really used to like taking organ lessons. An electronic keyboard just doesn’t cut it.
As for the body, gotta be the brain.
I think Emo Phillips (very strange comedian) said it best:
My favorite organs are the ones that work.
Robin
I have always liked the liver. So versatile.
But I have stronger opinions about organelles. I saw a contractile vacuole do its thing once under a stereomicroscope and it nearly brought me to tears. I’ve also enjoyed the ribosome. Industrious little bugger.
This thread is not normal. It’s weirded early, out like a cyber equivilent of a Tim Burton film.
I’m leaving and I’m taking all my organs with me.
You weird . . . ORGAN people !
I’m a big fan of the liver, because it does so much. And I admire the design of the eyes, and their extreme usefulness. But my overall favorite organs are the external reproductive organs, because they’re so much fun to play with!
Organ lessons? But it came so naturally!
I’ll take a Hammond B3 anyday, especially if it comes with a pair of Leslie 122s.
Well, of course I meant a theater organ, screech-owl! Real air through real pipes can blow tinny little electronically amplified tuning forks out of the water with no sweat.
I’ve always been rather partial to the lungs. They deliver oxygen to your circulatory system, but more importantly they have an impressive degree of elasticity, which allows them to act as a sort of bellows for speech production. Yay!
I like the heart.
It’s sort of like the heart of the whole body.
Besides, it’s my one organ that works right.
I like my brain and I must say it’s my favorite or it might try to conspire againest me.
What?
A lot of people seem to get along fine without one, but I’m not one of them.
I would have to say the small intestine, specifically the duodenum. I was gonna say brain, but that didn’t seem appropriate seeing as I was born anencephalic and all.
You stole my line! Seriously, I was gonna type the same thing.
But you know what they say, better to have lobsters on your piano than crabs on your organ.
Spleen.
Say it with me now. Spleeeeeeeen.
Ah, it’s such a fun word!
Here’s a good ice-breaker: “So . . . how’s your spleen?”
What does the spleen do?
Flower delivery guy: “Here’s your tulips, where would you like me to put them?”
Yes, the spleen is elegant. It serves two functions: it removes old, tired red blood cells from the circulation and it’s vital in fighting bloodborne infections.