Usually just peanut butter. My two favorites are smooth Smart Balance and Cinnamon Raisin by Peanut Butter & Co. The latter is so delicious. Google PB&Co - they have a few other flavors, including one entitled "The Fire is On".
If I do add toppings (rare -- peanut butter is just that good on it's own), they are: banana, honey, raspberry jam (sweetened with juice, not sugar), nutella, or fig jam. Erm, not all together obviously, but you get the point.
While I don't grind my own, I have not regretted my move to natural peanut butter. It can take a few tastes to get used to because regular peanut butter has you trained to think it's sweet, but it's so worth it.
Has anyone tried peanut butter and bacon? I've heard good things.