How come you are not able to play Skyrim?
Anyway, when I play alchemist, most of the potions I create are multi-effect potions that I won't actually use, but sell instead for cash. As I level up and take perks to make stronger potions, I can make potions that sell for 1000 septims or more. It will be something like Paralysis, Restore Magicka, and Damage Magicka Regeneration all in one potion. Quite useless, but good for making money and leveling up alchemy skills. More expensive potions you create, more experience you get.
Potions that I create that I use are Fortify Smithing potion and Fortify enchanting potion. Fortify barter potion sometimes.
I occasionally use paralysis poison, but mostly I end up selling them because they are worth a lot of money. I also mean to use invisibility potion, but I end up not using it.
The potions that I actually use most are potions of healing of various strengths. Potion of Ultimate Healing is nice to carry around. Nice insurance for when you make stupid mistakes.
Lately I have not been making potions. Playing an alchemist makes me too OCD. I tend to hoard potions and very stingy about using them.