I was in the Canadian reserve from '79 to '88. I got called up a few times to the Regs, Once for a year, a couple of times for 3 months, mostly for large exercises. Once to Germany (NATO), Once to Norway (NATO), most times to Central and Western Canada.
I never went on a tour, but I miss alot of things with the Military.
I missed throwing Grenades at old tires. I miss blowing more holes in old Sherman tanks with the Karl G. I loved to shoot, so I miss the days on the range. 
I do not miss cleaning my rifle (I always saved the Gas Plug for last  (think FN-C1).
I miss doing a combat insertion from a Griffin (Huey) in winter.
I do not miss lying on the ground in the wet snow as the Huey flies out over me in the winter, it is already cold enough.
I miss the peace and quiet of a defensive position in the early morning, the smell of the dew, the chirping of birds, the snoring from the next trench.
I do not miss digging trenches in rocky ground. 
I miss the isolation and calmness of being on a recce patrol in the middle of the night, secure in the fact that I had a loaded weapon and could deal with anything that came my way.
I do not miss being so tired after out walking all night, the pungent smell of unwashed bodies, and walking in wet bog up JUST PAST my belt buckle. (oh, the shrinkage and chafing!!)
I miss driving around southern Germany in the back of a 113 on sunny days.
I do not miss driving around southern Germany in the back of a 113 on rainy days.
I miss getting a hot meal in the field after days of rations (salsberry steak - how many readers just cringed 

I do not miss getting a hot meal in the field when it was raining, the water dropping off your helmet into your potatoes and bread, then holding your hand over the whole thing and tipping it to drain the water (and gravy – gravy? What gravy?).
The smell of Diesel reminds me of Grizzleys and M-113s.
The smell of gunpowder at fireworks reminds me of every weapon I fired.
The smell of an old building, reminds me of mouldy barracks (must be the floor polish)
The sound of a shovel on a rock .. well you know…
The Army made me the person I am today, every event in my life is always compared to my time in the Army. It was my defining moment, the part of my life I remember best until my kids came along.
And I miss my buddies the most.