ColoniesTogether+

This modpack includes mods such as, Minecolonies, Origins++, The Twilight Forest. As for changes you will see in game none will be very noticable unlless you go looking, like MineColonies which adds in the ability to build up a village toyour own liking using the AI villagers that spawn along with the types of chests you put down ex: Miner, Lumberjack, Farmer, etc. which can help take away from the constant need to gather certain items yourself. Origins++ adds in the ability when starting a world to choose among 100+ different races all of which have up sides and down sides and if that mod is not to your liking you are fully able to spawn as a normal human making it a completely vanilla start. As for The Twilight Forest it adds in a new dimension which you may or may not choose to visit however if you do it adds many new mobs, armor, bosses, and dungeons all to be explored. Even with all of these mods included it is entirely possible to play completely vanilla while using the very minor mods that just enhance basic minecraft like Backpacks, better dungeons, etc.