My mystic archer has never ever created a potion or poison but does make rare use of a few that she finds. She carries a few potent healing potions but only to pass out to followers (she heals herself by spell). Unfortunately she does have to carry a few to cure disease potions since that spell is criminally absent from Skyrim.She used to use poisons once in awhile but doesn't bother anymore.
Although my character doesn't use them anymore, paralysis poisons are pretty effective for those not immune.
Er no, honestly. I don't mix them up either, always meant to get into it but never seemed to get around to it. Enchanters' or Blacksmithing potions are useful if you're into those things, but only if you're making up weapons/armour for yourself they're too rare/expensive to waste otherwise.
It depends on the character. Some use potions, others do not; some use poisons, others do not. In this, as in so many other areas, I let my characters guide me.
It really depends. With a few exceptions (characters that are assassin types), poisons are never used. Potions... I only use restorative potions when in dire need during combat. My magic users use up magicka potions early on like there is no tomorrow.
For me, poisons and potions have me feeling like I am "cheating." Many of them boost my character above what they can do. I still have the mindset that if I can not defeat an opponent without the use of poisons or potions, I am not ready for that encounter. I guess many of the potions have me feeling like I am turning the difficulty down