My favorite issue in ceramics has always been to create large jars and vessels. The bigger the better! Ideally so large that they can stand by themselves – for example, stand securely on the floor – without you having to worry about stepping or stumble upon them. (Surely I must have been one of the potters building huge terracotta oil jars at the Palace of Knossos or somewhere – back in ancient times.)
I also do stuff like small cups and bowls – still I have this ongoing and special passion for the large scale where only the size of the kiln sets a natural limit. In time I (or at least my arms and shoulders) will probably learn to appreciate this kind of limitation.