I like the Tascams, they look cool to me, and have a feel that they are built well. However, the little Fostex is nice too, because it is little, and light, and easier on the back.
But I also have an Otari 2 track, which is nice because it can select 3 different operating levels and has bias adjust on the front panel.
So it is hard to say a "favorite" because it depends on the application and mood.