It's kind of the same with me. Back when I first got into anime and didn't know about fansubs, everything I watched was on vhs/dvd on a television, and I'd always watch all three or four episodes in one sitting. Now that I watch everything on a computer, I almost never watch more than one episode at a time. Although I actually like only watching one or two episodes a day better, as I do so steadily rather than experience the periods of burnout that came with watching six or more episodes per day.
There was also a period of time when I discovered ANN's anime listing and rating feature, and I forced myself to watch more episodes than I actually enjoyed in an effort to make my "seen all" list bigger. I would even finish series that I absolutely hated just so I could give them negative ratings on my list, making me feel like a more well-rounded anime fan. Yep. Anyways, I feel like one or two episodes a day is a good rate for long-term fandom, with the occasional marathon of something really exciting.