The item collector is fun and also a great way to boost up quest points, but the items don't vary as much as I think they were intended to.(my personal opinion)
The item collector looks for new items every hour, which is great, but in a four hour period you may only see two different item sets. For example, he may ask for "swords" and the next hour he'll ask for "keys" and then "swords" again, and then "keys" again...
The item collector is one of the first things I check when I log in! But, I've become less enthusiastic over time, as the variety is sort of lacking.
Ahh well, just giving my two cents. Thanks for reading. ^^