Not to pick on you, but did you read the instruction manual? 1st off the similar programs Tivo records is an option and can be turned off, I turned mine off. I am not sure what you mean by saying you have to time the programs you want to watch? You search for a show hit record and it records it, if you want a season pass, hit season pass and it will record all the episodes of that show, simple really.
The best thing I like about Tivo is the ability to watch two shows at once. Watch one show, it goes to commerical you flip back to the other rewind it and watch it, then flip back to the other show and watch that it's great.
The new directv HD DVR doesn't have this option, it allows you to record a show and watch another, but you can't flip between two shows and rewind what you missed. I did read Tivo and DTV came to an agreement and Tivo will come out with an HD DVR next year, I will be getting that one.
just my two cents Tivo is better than direct tv's DVR. Plus my dvr has problems freezing up, sometimes it won't turn on, and I need to reset it, never had those problems with Tivo.