Two Hobby suggestions.
Bird Watching. Rare birds spawn at random locations and times. Limited time for the spawn. Several differing ones in each zone. Players must target and do a /look or some such skill to register the sighting for the deed. Rewards could be titles and housing items like the fishing trophies. Maybe a painting or a bird on a limb.
Butterfly catching. Same as above, but with Butterflies. Players must catch with a net.
How about it? What do you guys think?