I used uTorrent before Azureus and uTorrent would break my connection to webpages (hogging all the bandwidth, I suppose). That was unnacceptable to me (I had used BitLord previous with no throttle and did not have that problem) so I looked for somethign else and found Azureus, which is practically identical to uTorrent, at least in appearance. Occassionally I get good download rates of about 30Kbps, and rarely I get higher rates, but most of the time it is between 5-20KBps. I've set my router and firewall, DHT is enabled (whatever that is) and my NAT is okay. And still if I don't have a global throttle of about 5k upload speed my internet browsing is basically dead.
I never throttle my download speed as it has never affecting my browsing.
I would much prefer to download via http, so I can get at least 80KBps+, but files are much easier to find using a BitTorrent search site and for those truly big files, it's a major plus that it can resume right where you left off with no extra software (that doesn't always work) necessary.
When I made the switch to Azureus from uTorrent I found that I liked Azureus better. Still my download rates are usually much slower than anyone using 1.5mbps broadband should get.
I also heard about a tit-for-tat thing. Where if you don't upload as much as you download you get slower download rates. I only skimmed over the messages after reading so many of them, but did anybody else mention that? I try to keep my share ratio at about 1, but with having to throttle my upload to 5k all the time it doesn't work out so well.