A few more from me and that’s it, bed time. I like the responses so far.
How about smolder, passion, and destiny. Um… these all fit together.
Still aversion and intrinsic are my favorites.
skulduggery
I’ve gotta back up Loopus and say that kumquat is a fine, fine word. I once managed to make a coworker laugh uncontrollably for the better part of an half-hour just by repeating that word.
Another personal favorite? Pusillanimous.
Takes a bow 
In Chinese, there’s a… phrase? Saying? It’s a “Chung Yu”… sounds like “Dong dow tsi wai”, and it’s literally “East fall West bent”. It just sounds so funny…
In English… Hm, “dagnabbit” erupts into giggles calms down a little I think any word starts looking funny after you look at it for a long time.
Heinous is my favorite word. Onomatopeia is also a pretty cool word. It was good song, too.
My favorite swear word is Dickweed.
Hi Tabeitha!
I love mellifluous, though I have little occasion to use it in my household. We all kinda bray like donkeys. 
I sometimes tell my son that he’s refulgent.
Moribund, plinth, serendipity, badger, ginglyform ( “hinge-shaped”) & sesquipedalianism ( “a tendency to use long words”).
Sorry, I guess I should have been more clear. It’s not an English word, it is Tigrinya (East African language) it means “Hello”, and it also means “Peace” in Arabic.
Bosums.
Say it with me: bosums! Teehee, I love that word.
When I was in the 4th grade, I used to love the word antidisestablishmentarianism. Didn’t know what the hell it meant… I just felt like the Queen of Everything because I could spell it.
Now I prefer to stick to as few syllables as possible, and wherever possible, I try to get my message across with grunts and flails.
I like words with bizarre or unusual meanings:
defenestrate - to punish someone by throwing them out a window
callipygean - having a beautiful bottom
benthic - dwelling on the bottom of the ocean
Alas, opportunities for use are few. One of my favorites that I do often use is “glom”, as in “I glom onto every sesquipedalian word that I read.” I’ve seen this more and more in published writing in recent years.
I have a few words that I like to say just because I like the way they sound:[ul]
[li]attaché[/li][li]caterwaul[/li][li]isobar[/li][li]scamp[/li][/ul]
Every once in a while, I come across a word that I want to add to my list of favorite words, so there are a few others not listed here. However, I can’t think of them right now.
Tergiversation - the act of looking back over one’s shoulder.
I just like the way it rolls off the tongue, and the way people give you that hunh? look.
Spiffy is my word. I don’t use it correctly (as pointed out by a friend), but I do toss it into my everyday conversation as much as possible.
Euphemism and intrinsic are pretty good too. Totalitarian is nice for that sheer twisted-tongue feeling.
jessica
deflower
My favourite words to say are plethora (rolls off the tongue nicely), buoy, and khaki (both of which are also fun to say and sound vaguely obscene).
There are some beautiful place names…
Schenectady… Bethesda… Ypsilanti…
– CH
It’s a toss-up between “superfluous” and "vacuous ". Superfluous is fun because I know someone in my computer science class that proudly descrives himself as superfluous. He hasn’t grasped the word’s negative connotation.
Sesquipedalian
My favorite sesquipedalian is Moolahoop , the little plastic seal around the top of a milk jug.
I guess I like ‘philistine’ and I tend to use it a lot (especially in reference to my kids’ lack of appreciation for the finer things in life). I mean, what would YOU call some ingrate who, upon being presented with a delicious meal that you had prepared with the most expensive of ingredients and meticulous attention to detail, proceeded to drown the lot in tomato sauce? For years the buggers thought it was a term of endearment…