My Inventorys are full too. 100+10 (bazaar) both retainers and 89/100+10 on my Character.

But the problem with your request is: Unless they give us Unlimited Inventory-space there will be always someone asking for more. If they add another 50, the ppl who got full Inventory now will get those additional space full too very soon.

Just dont keep every item, i have to learn it by myself too.

In FFXI it was even worse btw. at the time i did play it.