We should consider some world building - settings, NPCs, quests and monsters and bosses for levels 2-25.
As for weapons I think any kind of melee weapon that can be categorized simplistically should be fine for starting characters, and for special weapons maybe we can talk about an extra skill - like Klein's Katana skill - though these should rightly be rare. No reason why some of our players couldn't be the other handful of players that gain these extra skills though!
As long as it isn't something god-like though like Dual Blade or Holy Sword, I doubt anyone else will have a problem.
Axes, spears, one/two handed swords, curved swords, maces, hammers, halberds, pikes, daggers and throwing knives, unarmed martial arts, claws and scythes, and even bow and arrow should all be game I think.