Always Argonian
Always some kind of warrior
Always does the golden claw
It's hard. It took me a long time to break the habit, but I'm finally at the point where my non-alchemists don't try to get every ingredient in sight. It still takes me a few minutes at the beginning of a new character to remember to gather them or not, but then I'm fine.
As for things I always do...
These days all of my characters use a conjurable horse mod even if they don't otherwise use magic.
I use My Home is Your Home, but I never have more people than beds in the house.
I always organize my items, clothing, etc when I move into a house.
All of my characters cook and bake. Since Heathfire, I won't live in a house without an oven, even if I have to use the console to put one in.
Always eat, sleep and bathe.
Always do at least Dragon RIsing, even for my non-DB characters, because I like having dragons in the game.
Always play female.
Always play mage.
Always play pick nirnroot.
Always clear the forts before the Civil War quests.