My experience is this:

If too nose heavy, it'll require a fair amount of UP trim to fly level. And you'll also find that you will run out of "UP" upon flairing to land. At such a slower speed, the nose wants to drop requiring more UP to counter. However, a CG that slightly favors nose heavy makes for much more a stable flying airplane.

On the other side of the coin, an aft CG creates more instability and pitch control becomes ultra sensitive as compared to being nose heavy. Snap stalls are relatively common depending on the type and spins will tend to flatten out becoming much more difficult to recover from.

Hope that answers some of your questions.

Ted