Fallout; NV had an excellent way to draw the player into the waste-land by adding the hard-core mode, in which the player had to eat, drink and sleep enough in order to keep the stats of their character up. Can this be implemented in Skyrim? I think that this would add some great opportunity for role-playing.

Fishing?

Entrepreneurship? Investing in stores/ working on farm is great... how about setting up a store/ farm ourselves? rent a building, choose kind of stock, hire staff, invest in logistics, relevant quests (store break in, shortages, delivery cart raids, competitors etc)

It would be great to be able to conjure weapons other than a 1h sword or a 2h axe. A big part of the 1h/2h perk tree becomes useless when choosing to play as a spell-sword. And why can't we conjure shields or armour? Running around, blasting fireballs as a mage before turning into a Daedric wall of steel and pain seems like a nice way to switch up tactics mid fight. I understand there would be a balance issue in the case of conjure armour - what armour type? what AC? etc. - but this could be solved somehow (iron for lvl 1-10 steel for lvl 11-20 etc.)

Also, could it be possible create thrown-explosives with alchemy?

Fletcher skill? Make your own bows and arrows.

A 'back-pack' on owned horse. access through sneak + activate. A way to store items for players who role play as wanderer.