Hi Nate, we need to work up to real personalization. Per greg's comment below (hi greg!), people's feelings on this stuff varies widely and doesn't correlate well with transit agency performance data.
PATH is cheaper, cleaner, and except late at night runs very frequently. I've taken it for entirely-within NYC trips when it makes sense.
Unfortunately you can't use any of the MTA's unlimited passes (daily, weekly or monthly) to get on the PATH.