If you decorate, what is important to you and what are some of your favorite things?
I think I answered the "Do you decorate?" question in my earlier post

lmao

but then I saw this part... so lets see.
For autumn, I do mostly fall leaves. I have some pretty wreaths and florals and such. I also have a LOT of candles (Spiced Cinnamon Apple is my current fav) and a really cute little ceramic light-up - it looks like a roadside fruit stand and you can see inside the windows and doors where there's tiny little baskets of apples, etc. The kids love that one and always ask for it. I'll use tablecloths in autumnal colors, and rotate sets of placemats with fall leaves, or apples. For Thanksgiving, all of the above comes back out, with some turkey-and-Pilgrim decor and a few wooden "thankful" themed signs and wall hangings.
When it's time for Halloween, we go all out. Spiderwebs and purple-and-orange mini twinkle lights on the front porch, decorative wooden signs (I have one that goes by the front door that says "The Witch is In"

), ceramic haunted houses, and tiny pumpkin lanterns that hang on hooked stakes along the driveway and sidewalk. I have a large collection of different kinds of Jack'o'Lanterns in different mediums (ceramic, glass, etc) that get placed around the house. Also DH LOVES to carve the super-intricate, mind-blowingly difficult Pumpkin Masters patterns, and he hates to see them shrivel up and mold, so each year he buys a "Fun-kins" pumpkin to carve on. They never die, so now we have a collection of those to display as well. Table linens and kitchen towels switch to Halloween colors and patterns, and the candles go from Apple to Spiced Pumpkin Latte.

Come Halloween night, DH even breaks out his fog-and-sound-effects machine and hides it in the yard to create the proper ambiance for the trick-or-treaters.
When its Christmas, we stay pretty traditional. Icicle lights on the house, red bows and pine garland on the porch, Christmas tree in the living room (always real, never fake) with a tree skirt that I quilted myself, pine wreaths scattered about, and several lighted ceramic houses. Table linens and kitchen towels switch to Christmas colors and patterns (especially red and green plaids), and the candles go to Pine Tree scents.
Valentine's and St. Pats are very small. I have a few bits and pieces like themed "Welcome" signs that hang outside of the door and a themed wall hanging on the entryway wall inside. Also seasonal table linens and placemats, and usually candles in the right colors (but whatever scent I feel like having).
By the time Easter comes around I am VERY tired of winter, and Easter decor is less eggs-and-bunnies and more HOORAY IT'S SPRING!!
Lots of florals, spring-y colors, spring-scented candles, and pastel linens. There's enough eggs-and-bunnies in there so you know what season you are in though.
4th of July? Just flags, mostly. We line the driveway and sidewalk with small flags, and hang bunting on the porch. DH flies his USMC flag along with the American flag on the house. We don't do much else, as we are usually too busy and not in the house anyway.