I created my chotbars to be comfortable, practical, and aesthetic.(to me anyway) Nearly all same/similar skills are in the same position across all jobs/roles while allowing for as little finger gymnastics as possible.

My XHB is split between chotbars 2(left) and 7(right)

Standard Samurai Controller/WXHB setup

XHB 1 - Single Target Main Actions

Work In Progress SAM controller setup

things to note: I am a casual player and have set this as a draft setup, subject to change on testing, please use as a template. Main XHB is 1, WXHB is 2 and expanded XHB is 3. for simplicity will now be abbreviated to HB1, HB2 and HB3. HB3 is shared on all classes for me, on DPS second wind is always on the same spot RT+ LT + Y along with mount, teleport etc (not shown).

SHING SHING SHING

Single Target (L)

Mobs (R)

a xHB layout that seemed more efficient after reading a few guides and gaining better ability context

Pretty easy to follow

Updated for Dawntrail

Buttons consistent for similar job actions (Dye = Potion)

I show Cross Hotbar 3 (Left) with both of the expanded trigger controls, so you can easily add in another 8 actions if you prefer, I use XHB 8 as a shared bar between all classes for traversal and general actions outside of combat. Role actions are consistent among my layouts, and so are general actions. The macro icon is a placeholder for a Tincture/Gemdraught.

Shoha II is gone (finally) which allows all skills to fit on 2 and 2/3 hotbars

These are my SAM hotbars, very much a WIP, Hopefully you enjoy :)

Almost Entirely Based on asah's SAM Dawntrail: https://www.xivbars.com/job/SAM/4071

Main XHB is split up with Directional buttons on LT and Face buttons on RT. WXHB has all the important buttons that you will press on the RT this includes you pot, with healing skills/healing potions on the LT. the Expanded XHB has same skills on both configs and has your AOE skills and de-buff skills plus Limit break.

This setup has a smooth layout that make pressing all your buttons with little stress and with great flow. For 7.0 you can see Zanshin replaces Ikishoten after using it so you don't have to change the layout to accommodate the new skill. And since Shoha and Shoha II are one button it also frees up a place to add either a role action skill or something else.