An ardent enthusiast or admirer.
A fanatical or zealous believer in a particular religion or god.
Someone with an amputee fetish.
A serious, enthusiastic consumer: not professional (earning money), but of similar interest and skills to a (generally lower level) professional, or aspiring to such. The target market of prosumer equipment.
A person in postindustrial society who combines the economic roles of producer and consumer
Targeted at serious, enthusiastic consumers, incorporating professional features but often modified for non-professional use.
high-end