Cars always remind me of my color blindness even if its obvious what color the car is. This is probably because when I was a kid we got a light green car which I would confuse with many other common colors. Our car was a rather unusual color and any silver, tan, and light brown (common car colors) would look the same to me. They still do but now whenever I see a motor vehicle, especially Hyundais since that's the car we had, I think of being color blind.

Also, pools depress me. Not because I have anything against them, in fact I enjoy swimming, but because it means its summer. On the reverse, a closed pool makes me smile. This is all because I love winter and don't enjoy summer. I don't hate summer I just don't find it enjoyable. Not sure if this one counts as being classically conditioned but it might .