I wanted to suggest a feat chain (or maybe even one feat) which will improve drinking potions. As of now potions are sort of neglected (all exept mnemonic), because anything they provide is not enough. Sure you can have a few spare bottles to heal yourself, or some buff potions (mainly invisibility) to get through tight spots, but overall they are something you do not really need. This chain of feats was made to change this.
As a first feat i suggest to have something like "Active drinker". This feat does one really important thing: it allows you to drink potions WITHOUT stopping your movement. It is a bane of any potion drinker, when your hireling/party is dead, you are low on health, and just as you try to restore while getting your party back to shrine, with drinking that little refreshing potion you actually STOP to do it. And then enemy tear you to shreds leaving your party in need of recall/cakes. So this feat will fix that and allow you to be more active while drinking!
As a second feat i suggest something like "Extendet circulation". This feat works like Extend Spell metamagic, but for potions! Now we can have our potion buffs for twice as long! (and for no additional cost!)
As a third feat i suggest something like "Drinking habit". This feat works like Artificers knowledge - potions, and it gives you an additional caster level to the potion you drink for every 3 levels of your character. I think it could stack or not stack with artificer, as i never played him, i dont know how much does he needs those CL into his potions. But i am totally sure about how much other classes which do want to drink a potion need those CL.
Maybe this feats could become one. Or two. And i think they should be yellow feats for fighter. But with this feat chain you would become more self sufficient, and i think its great. And please dont forget to change the names for something better suited to game. Oh and i WAS serious.