Gents, do yourselves a favour and skip to either canola or grapeseed. Flaxseed oil is the best scientifically speaking, but also probably not worth the premium you pay to get it. Canola and grapeseed have similar smoke points, and are both (relatively) high in the ALAs that you want to maximise the 'hardness' of your seasoning and are also cheap. Also, if you're ending up with sticky/gummy patches, you're using too much oil. Make sure you're wiping it almost clean before heating.
Jug, you could use peanut oil, but it's pretty low in those fatty acids that are ideal. That's not to say that it won't work, it'll just take more coats to get an equivalent coating.
Flaxseed oil isn't meant to be a cooking oil as far as I know, it's a health food/supplement. New-age voodoo for people who don't eat right in the first place.