Comments on Gear - mostly focused on end game gear here, but much of it applies to heroic gear as well.
Affixes I dislike seeing on gear:
Quality Will Save, Reflex Save Fortitude Save - too small to be impactful. Would much rather see a quality stat here or just quality bonus to all saves.
Reflex Save, Will Save, Fortitude Save - resistance is much better even if 1 less.
Anything class-specific such as reinforced fists or Druidic Survival Mastery - there should be augments specific builds can use for these instead
Insightful Deadly, tactics - redundant with trance
<Stat> skills: Exceptional bonus - occasionally useful, but not often except for a trapper. Should just be an augment
Magic Efficiency 10% - unless it changed, doesn't stack with other non-gear sources
Proof Against Poison: Does this even work?
Proof Against Disease: Does this even work?
Tendon Slice: Rarely impactful to justify a gear slot
Competence Elemental Resistance: Rarely impactful
Immunity to Fear: Prefer to just slot an augment if I need this as so many builds end up getting this by default
Insightful Resistance: Just a downgraded version of parrying
Distant Incite: If a tank I will use shield throwing if I need to agro mobs
Linguistics: Niche thing for maybe an off-tank that over-relies on intimidate
Physical Sheltering (prefer 1 augment vs. 2 gear slots)
Magical Sheltering (prefer 1 augment vs. 2 gear slots)
Acid, Fire, Cold, Electric, Sonic Spell Resistance - not worth a gear slot usually - would prefer absorb as it's more impactful
UMD +x: Not really needed at end game
Putting Ranged and Melee affixes on the same item
Putting Martial and Casting affixes on the same item
Affixes I am less excited about
Anything I can get on augment - accuracy, deadly, combustion, etc.
Exceptional Healing Amp - not impactful except for maybe a tank
Affixes I often have trouble finding
Typically things that can't be found on an augment
Quality Deadly
Quality Accuracy
Quality Combat Mastery
Seeker, Insightful Seeker, Quality Seeker, Exceptional Seeker
Crown of Summer
Action Boost Enhancement
Insightful Armor Piercing
Insightful and Quality Stats
Insightful Sheltering ideally although I'll take insightful magical sheltering and insightful physical sheltering
Quality Sheltering ideally although I'll take quality magical sheltering and quality physical sheltering
Insightful <spell type>, e.g., insightful combustion
<Type> spell lore, e.g., fire spell lore - almost non-existant on this gear set - like to see insightful combusion and fire lore on same item ideally
Quality Spell Focus (hard to find)
Sacred Spell Focus (hard to find)
Insightful Spell Focus Mastery (hard to find)
Insightful Potency
Quality Potency
Exceptional Spell Power, Exceptional Lore
Force, Light, Alignment, Poision Absorb
Spell Saves and Insightful Spell Saves