We are staying off site (gasp!!) in 2008. For the first time we will not do park hoppers. It just seems like too much effort to start at one park, get car, drive to second park, get car and drive home. Or even if we use Disney transportation, start in one park, use bus to second park, use bus back to first park, then drive home.
WE have always gotten hoppers in the past, but really only used them on the last day to do commando style, all four parks highlights. With a three year old, I don't see us doing that in January.
We are subscribing to TGM, whom dosen't seem to base his best days on park hopping. First time trying him out too. For my family of five, its a pretty big savings not to hop. Four adults and one child admission at like 40 a piece I think. Roughly 200 bucks. The home we are staying at only charges us 1100 for eight nights including tax, so 200 is relatively expensive.