Some of my favorite mods:
PyPipBoyApp (which I mentioned earlier)
Achievements - One of the latest patches stupidly disabled achievements in modded games. This mod re-enables them.
Better Settlers and
Don't Call Me Settler - These make your settlements more lively and less like clone factories.
Craftable Armor Size - Allows you to switch between light, medium, and heavy armor stats and appearance, provided you have the required perks and materials. Pretty well-balanced IMO.
Armorsmith Extended - Contains a bunch of new outfits and allows you to wear more types of outfits under your armor. Unfortunately, it's not very well balanced as you can wear very powerful outfits along with your armor (which was obviously not intended by the devs).