The challenge itself is worth it. Taking photos of these insect before they fly takes a lot of patience. Using a digital camera is another thing. But after a long day of taking shots (or an hour rather), the results are satisfying.
If I get sick one of these days, you know who to avenge me from.
But hey, this fly business is really getting into me. If you have a pet fly that you want to have a portrait taken, call me ;)