My thoughts on Portrait Size:
Portraits can be used for many things - not just an image of the selected character. I use them for objects and backgrounds too where I give visual clues and prefer high quality. That being said, I want 200X200 or higher for "stamps" but I am ok with 100X100 (or less) for tokens.
But the harsh reality is that each GM is different, or as Azhrei mentioned, client specific depending on resolution settings. Each person will want to use this their own way - flexibility is important.
So I am very bummed that it is forced to 100X100 now. I want to see it configurable. Let us decide. We can use Maptool for several different things so we need flexibility - for example, I was thinking about using Maptool for a family tree of my family where we would want to see a nice portrait of each person in the tree - something of quality. Snikles Alien game had nice sized portrais of characters, eggs, Alience, etc. Now there is talk of using Maptool for investigation style gaming where there is evidence to be viewed - Maptool need to allow freedom.
We need the following freedoms:
-Show/Not show the Portrait - currently in B25 we are forced to see a portrait if there are stats attached to a token. I don't want that kind of clutter. I want to just have portraits for my NPC's/Bosses and Players, not for the 100 skeletons on the battle field.
-Specify the portrait resolution - I might want a 400X200 picture of my grandmother to appear when I click on her image on my familty tree or I may just want little 75x75 portraits of my players - players know what they look like because they have been playing for 5 months. At first though I might want them 200X200 until they get sick of loosing screen space, and then switch them to 75X75.
Both of the above settings can easily go in the config tab in token properties.
) I've been using 600px, but that's obviously resolution-dependent, so I may switch to em or cm at some point.