Although users' viewing data can be uploaded to TiVo on US models, that ability is always switched off on UK models. I believe that the data is only used for anonymous market research, and is never downloaded in any way to other users.
Suggestions are always treated as the personal taste of the individual viewer. If you use thumbs, it is advisable to stick between the range of -1 to +3. The other negative values can cause you to miss more than you intended, because the genres that it marks the thumbs against can cover a wide range of programmes.
Windows 7 MCE, 2 x Freeview Tuners, 1 x HD Freesat Tuner, 1TB Hard Drive, 1.5TB Mirrored Raid on e-SATA.
1 x Xbox360 MCE Extender.
1 x LinkSys DMA2100 Extender.
1 x Broken TiVo.