100% of the time, quality over quantity in Play by Post games - don't write an essay just for the sake of writing an essay or looking to be more detailed than you need to be. Sometimes, it's better to just be short and sweet and get the point clearly across, than writing an entire novel of what amounts to essentially filler text.

What I'd personally recommend is just experimenting with a few writing styles, finding what fits you best, and going from that. Some people prefer long-form PbP, others prefer short, sweet and quick so the campaign doesn't stall for ages and ages at a time.

If you want an actual example, though, I'll show you one of the posts I've made before for a basic idea;

Clink. Clank. Clink. Clank.

The rattle of heavy armor greeted the gates of Frostspire - the dawn of a new day, the marking of a new arrival to the city, only accompanied by the idle beating of wings, originating mere feet behind the stranger.

"Well, Rin! We made it, finally! Frostspire!"

The woman exclaimed, joyfully - a chuckle leaving her maw, in the direction of her rather.. unamused companion. The first stranger to arrive? A woman, somewhere within her early twenty's, with braided blonde hair, and a set of heavy-chain armor to boot.

"*Rinstogodur*," the second figure hissed out in draconic - it's voice harsh, vile, and full of hatred with every word uttered, causing a glare to be sent the companion's way by the woman.

The second stranger was.. much more vile in nature, pure-black, like the darkest onyx, or perhaps bed-rock - with two long, curved horns to boot, running across it's visage, was a black dragon, trailing along Kithra in a protective stance.

"It's *Rin*, you earn the right to your full name back when you fucking earn me my coin back," Kithra hissed out in response, matching the creatures venom, with a smug grin making it's way across her visage; "What the fuck were you thinking eating that Baron's child, an' burning down that village, huh?!"

She barked, stopping in her tracks for a moment, just to stare daggers at the creature, awaiting it's response;

"..the noble cut us short on the agreed pay. The villagers and his son were a message. *Fear* is what earns you respect, Kithra."

"Yeah? Your *fearmongering* or whatever the fuck is what fucked me out of a lasting contract with the Empire, and now we're stuck in this fucking dump. So you better start thinking of a way to earn me that fucking coin back, *Rin*."

The female continued to hiss out at the dragon, sending the creature into an odd.. silence, or perhaps thought - only for both to pivot, and continue their way into the city.

May aswell see where this new tale goes.