You bring up a point that is near and dear to my heart. In your list, Seroquel is that med for me. It definitely affects my thinking, which is why I only use a tiny dose, PRN, and avoid it unless it is absolutely necessary for me to get to sleep. I wasn't on Lithium long enough to judge, because I can't tolerate it due to other side effects.
As others have said, the meds all have the ability to affect our thinking. That's what they do. The cognitive effects are side effects that we have to deal with one way or another. That could be switching a dose, stopping the med, or adding something else.
Personally, I'm an engineer by profession and don't have the luxury of giving up much gray matter. At present I tolerate my meds pretty well and seem to get by day to day.
My personality has definitely changed due to the use of medications, but I consider that the price I pay for having this disorder. The other thing to consider is that our perception of ourselves changes when we're on medication. When I complain about the side effects to my wife, she downplays the severity based on what she sees in me from an external perspective. She knows the difference in how I relate to the world, and prefers the medicated me to the unmedicated one. She's actually threatened to leave if I were to go off my meds entirely.
The topic of cognitive side effects is a tough one, with no easy answers. For most of us the meds are a lifeline and the better way to stay sane rather than ending up in the hospital again.