You've played a character or characters that use all ten subclasses from the
Sword Coast Adventurer's Guide?
You've played the thousands of characters needed to even use the majority of the crunch from either 3e or 4e? Have you honestly?
Grabbing a random splatbook off my shelf (
Complete Adventure in case it matters) I find the 192-page contains 26 Prestige Classes, which could be interpreted as subclasses, 55 feats, a bunch of new weapons, tools, and instruments, 75-odd spells, 30 magic items, and a bunch of other new rules on skills.
There's enough content there for a half-dozen characters mixing feats and Prestige Classes. You could have two or three level 1-20 campaigns just using this book and the PHB with no overlap in character concepts.
I bought the book shortly after it came out in 2005. January actually, since I apparently have a first printing. And even after playing 3.5e pretty regularly for three years (I was heavily into Living Greyhawk and Xen'Drick expeditions games at the time) I used maybe four pages in this book: the tempest prestige class, masterwork instruments, and a spell. I paid $40 CAD (far more than the $30 USD, the exchange rate was pretty favourable then) for those pages. $10 a page! I might have used more, but other books came along that had other Prestige Classes and spells that caught my fancy. The more books that came out, the less valuable the prior purchase was...
If I had been playing a homegame, maybe the book would have seen more use. More people tapping it for content. Or, more likely, they would have looked at the other splatbooks instead.
There is probably content in
Complete Adventure that no one used. Think about that: feats, prestige classes, or spells that no one in the history of the game used once. Because they just weren't as interesting as everything else. More time writing and designing a few options than they saw being used at the table.
If you don't want people to talk with you, you might want to avoid online discussion boards. That's kind of their sole purpose.
I go into what I would like to see and think would make a good sourcebook earlier in the thread. here:
http://www.enworld.org/forum/showth...osophy/page8&p=6927758&viewfull=1#post6927758
Not sure what I want after that. Or if I'll need much... There's a lot of awesome 3rd Party stuff out there as well.
I don't want a book that is just "here's the fighter book". Or even "here's the martial/warrior book". Those are boring. I can count the number of times I've looked at my copy of
Complete Warrior since I stopped playing 5e on a single hand. (Most of them were looking for ideas for designing new 5e subclasses.)
But books of lore and story and information... I still use 1st Edition books like the
Manual of the Planes and
Deities & Demigods. I still look up monster ecology information from 2e books and the
Monstrous Manual. SCAG and
Volo's Guide to Monsters will still be useful when we're all playing 7th Edition.