Peer priority is generally sorted based on the connection speed of the peer. Also, with our tracker, even if you have a faster speed than any of the other peers in the pool, if you are a passive node, you are automatically thrown to the bottom of the priority. To make sure that you are an active node and not a passive node, I would recommend being sure that the correct port in TCP and UDP is forwarded from your router to your computer. This will maximize your potential for upload traffic.
After looking at your profile, it would appear that your Transmission client is using the default port number of 51413, and that your uTorrent is randomized. For optimal results, I suggest forwarding port 51413 from your router to your computer, as well as setting ONE port number in uTorrent and keeping that setting, instead of randomizing it. This way, you can be sure that the correct ports are forwarded through so that you receive as much upload traffic as possible.