Make canceling auto-renew simple. I had to open a help desk ticket on your support site to request that my auto-renew be canceled. I am not even sure that will work yet. Canceling auto-renew seems to be a purposefully difficult thing to do. I should be able to simply go to the options area and click a button to turn auto-renew off.

I would buy Vuze+ if it had a built in VPN.
You see, anonymity is key 4 me.

I had so much trouble adding feeds/torrents to my search filter. Make Vuze add torrents sites/feeds automatically instead of having to look for and download sites...

instead of having to know what the movie name is just have them seperated in lists by genre for people to look through

If Vuze attracts advertisers to its site then the cost of the advertising on its site can pay for people to get Vuze Plus for free. It's a win win for everyone. Vuze makes money from its advertisers, Advertisers get additional business people get Vuze Plus free. everybody wins.

have a link or tab where i can pick a theme like google chrome.

See http://en.wikipedia.org/wiki/STUN for more information.

The majority of clients I simply cannot connect to at all. This is a serious problem when downloading files from torrents with small swarms. Reachability should be the number one concern right now, in my humble opinion.

When adding a movie to be played on a device (streaming), it would be good if you could also link the subtitle files to it. Either when you transcode, or just add the file to the device to play.

Azureus has a DHT implementation that is incompatible with the mainline DHT implementation that pretty much every other torrent client uses.
And while a plugin exists that solves this problem, it is not installed by default, and thus many users do not have it. This hurts both their their user experience(they cannot find approx. 80% of the peers via DHT) and the whole swarm's too(they cannot be found by ~80% of the peers via DHT).

Bundling the mlDHT plugin with new Azureus releases would solve these problems, and it should be very easy to do.

Near standard search add an advanced search with more search parameters as file types, excluded words, boolean match from words, etc.

It would be interesting if Vuze gave users the option of choosing different skin colors other than having the same blue as default.

I would like the possibility to automatically delete downloaded torrents after a certain upload/seeding limit. It keeps disk space and makes sure torrents are seeded enough. It's always hard to delete downloads when you need the space but have not been seeding so much.

When using Vuze have "My Torrents" open only. In Classic View.

Would like to have an option to make text white and background black (instead of standard black on white) so it fits in with the theme of the rest of my applications and looks cool.

(Being a java application, it seems nigh on impossible to theme with any kind of external hack / injected script.)

Some torrent proxy services provide multiple proxy addresses. Vuze should accept multiple addresses in configuration options. It should use proxies that work and avoid proxies that are not working.

multiple searches can remain in list at same time and are re-freshable.

java download integrated on vuze.
with automatic update through the vuze and java pro version
avoiding virus, older versions or bad installations.

as described in http://www.bittorrent.org/beps/bep_0028.html