I like the extra dough side of the argument myself. I have always bid reserve on training and vacation months because I've never been senior enough to get a decent pay month. So here are your positives:
1. extra couple of hours pay before any unknown change in status.
2. you stay current and qualified for a bit longer. (not fooling myself into thinking unicorns and rainbows, but you never know the pace of un-UNA-ing)
3. you get to get out of the house for a while. (Ok, VA ave is NOT the vacation hot-spot I'd choose, but it is out of the house)
4. you keep your head up despite the $h7# sandwich this career is currently handing you.

I hope you find the motivation.