I'm not talking about blacksmith potions alone, but about useless potions in general. Do you honestly use potions that increase your Alteration for 20 seconds?
Yes! The fortify potions are pretty vital for magic wielders, and you can make some nice three ingredient, multi-effect potions that are great for the class you are playing as.
For the mages... Nightshade + Glow Dust + Tundra Cotton = Fortify Magicka & Fortify Destruction
For the archers.. Juniper Berries + Elves Ear + Snowberries = Fortify Marksman & Resist Fire
For the warriors... Tundra Cotton + Slaughterfish Scales + Thistle Branch = Fortify Block, Fortify Heavy Armour & Resist Frost
I always carry class specific potions and enemy specific poisons with me, and when I've made a ton of gold I can afford to buy all the plentiful, vigorous and ultimate M/H/S potions from apothecaries. Then I can give my followers the weaker home made health potions.