Regular stuff added to stouts - raspberries, coffee, vanilla etc. More adventurous - chillies?
Or perhaps blend with something else you've brewed? Not sure how to figure out what or how much - probably half the fun
Primary : Zipper Club ESB
Secondary : Flanders Red, Berliner Weiss
Drinking : Saison Automne, Saison Ete, Springtime Pale Ale, Weizenbock, Belgian Pale Ale, Wit, Apricot Wit, August Amber Ale, Southern English Brown, Jade Cascade Pale Ale
Conditioning : Assorted Meads
On Deck : Belgian IPA
Waiting : Oatmeal Stout