We know that if an individual takes up a whole Shard, then over time (millenia or longer, in some cases), their goals and desires will fall in line with that Shard’s intent. Ati, for example, was originally a good person:
Ati was once a kind and generous man, and you saw what became of him.
The Way of Kings
However, when Ati took up Ruin, he eventually became bent on nothing less than the destruction of the entire Cosmere.
Similarly, Leras eventually was entirely unable to destroy Ruin directly, and Rayse became even worse than he initially was over millenia or more of holding Odium.
However, could it be that smaller amounts of Investiture still influence a person?
For example, every native of a world has some small amount of Investiture granted by the controlling Shards to give them sentience and a soul. Does that mean that people on Threnody are a little more ambitious, people on Scadrial more concerned with preserving, and people on people on Roshar more honorable, or more cultivated (or more hateful?).
Or when someone takes up huge amounts of Investiture without becoming a Shard, as the Lord Ruler did, does it influence them? The Lord Ruler, for example, presided over a technologically and culturally stagnant empire, a state which he brutally enforced. Of course, Ruin corrupted him, but that seems in line with the influence of Preservation.
Does possessing levels of Investiture below that of a Shard influence people?