If you like history, be sure and visit the old prison on the east side of town. Closed in 1973, now a museum, and you won't believe how barbaric this place was. Egyptian Theatre (downtown) is a fun place to catch a movie in a real art deco type theatre.
Great trout fishing within the city limits (canals and rivers), some good browns in there!
Best sporting goods store I've ever been seen in my entire life on the main highway from Boise going into Nampa / Meridian, sorry, can't remember the name. Walls full of all types of firearms HUGE selection. Very courteous people to deal with too.
Really good gun shows @ the fairgrounds!
Thouroughbred horse racing @ Les Boise, also @ the fairgrounds.
Downtown lots of fun for food and drink!
Beautiful city parks with lots of great scenery (get it?).
Now I would like to ask a favor of you. Please add my email addy to your address book, and contact me when you get settled. I'm considering moving up there too, but will need some info from a resident. Stay in touch, and best of luck.