Only one opinion listed so far so even with the thread being about a month old I feel the need to share an opinion that is a little different for the sake of argument.
I use high temp acrylic hot glue. There really only seem to be 2 diameters for hot glue sticks out there so I just the larger most of the time. That said I do have a high temp mini glue gun with normal high temp glue for smaller project needs.
I use the acrylic hot glue because it cools into plastic for the most part. You can use the tricks shown in build videos to squeegee excess glue down corners and end up with VERY strong bonds. It is HOT and it will burn the crap right out of you if you let it. I thought I was going to the hospital one night from a burn from these large sticks, but it works great. Just be careful. I have tried a lot of glue and this is the best I have seen hands down.
http://shop.hobbylobby.com/products/cordless-glue-gun-328484/
My large glue gun. You can remove it from the base and it holds heat very nice for a while. Maybe 15 min. More than enough time to make a few glue joints before putting it back on the base to heat up.
http://shop.hobbylobby.com/products/portfolio-board-and-sketch-pad-682120/
The glue I use most of the time. All my main joints or large areas get glued with this. Very strong.
http://shop.hobbylobby.com/products/high-temp-detail-mini-glue-gun-265157/
Smaller for the smaller needs. I have found that this gun is perfect for putting glue on the edge of the foam board. It doesn't get used a lot anymore, but it is still very nice to have. This is now the field glue gun for the most part, and for that it is very handy indeed.
Hope all that helps someone somehow.