I mostly use a seedbox so Deluge, ruTorrent and Transmission.
Some sites frown on seedbox use so I switch to utorrent 2.2.1. The best (IMO). It still works well with Windows 10 and is free of most of the ads and spyware which plagued later versions. Google utorrent 2.2.1 and a choice of download sites (AYOR) should come straight up.