To me a 2 degree FoV is still narrow. The bigger stuff of interest up there starts to be reasonably well encompassed when the FoV opens up to more like 4 degrees; larger in some instances. Numerous bright and dark nebulae (much more of the latter) exceed 1.5 degrees. When dim and/or of low contrast, an object is best detected when fully surrounded by sky so that edge detection can be most effective.
Case in point. A club member who owns a 4" apo exclaimed that my homemade 20.8X60 bino delivered better views of such objects as the North America and Pelican nebulae than could his scope, because the 4.7 degree TFoV nicely framed these sizeable nebulae. If I let him, he would forget his scope and monopolize my bino all night.
I agree with Glenn.. 4 degrees is is nice.. Now there are 4 inch apos and then there are 4 inch apos that offer a wide field of view.. A 4 inch F/5.4 offers about 4.5 degrees with the 31mm Nagler, about 4.9 degrees with the 41mm Panoptic.. And beyond that, the 80mm F/6 offers a 5.5 degree TFoV, the 72mm F/6 offers a 6.0 degree TFoV.. If Glenn's friend had had a 4 inch f/5.4, I suspect he/she would have been plenty happy with the view..
I'm interested in what others find worth looking at when the light grasp and resolution of a reasonably sized dob is used with a 1.5-1.8 degree field though. Large clusters are a good example. I'm aware that nebulae have the same surface brightness at the same exit pupils. I'm also aware that going to about 50 power and with at least 10 inches of aperture, different objects than typical bino targets may be personal favorites. I'm curious to hear about them, and appreciate the responses so far.
When it comes to wide field/richest field views, one has to think in a different paradigm, something Glenn has called, the Holistic View.. I think of it as a strategy rather than a list of objects to be observed.
For example, my 12.5 inch F/4.06 with the Paracorr and the 31mm Nagler offers a 1.62 degree TFoV at about 48x with a 6.6mm exit pupil. One of my favorite things to do is to start at M8-M20 and then in large, slow swaths, work my way through the nebulosity fields of the Milky Way until I am end up at M6-M7 region. There's a number of objects of a variety of types but the textures, the rivers and valleys that flow through the nebulosity of the Milky Way are literally something else.
Or start at M8/M20 and work the other up.. until I find myself at M-11 and beyond. This time of year the choices are more limited but certainly the region around the Rosette (O-III filter) and the Cone Nebula/Hubble's Variable Nebula are interesting, scanning Orion for clusters and nebulosity, you never know what you might find.. The region known as the Heart and Soul nebulae is also of interest again with filters.
So, again.. it's a different way of viewing the sky, Glenn's Holistic view.. how it all fits together.. Just put the eyepiece in the scope and start looking..
Oh, yeah, this time of year, in a 10 inch or 12.5 inch, the Virgo-Leo region is great for galaxies..