I've only had my 2015 Mazda 3s Touring HB M/T for a little over month and overall I love it. I test drove 2 different cars (3i HB, 3s Sedan) both with manual transmission (a requirement for me) before I bought my car so I knew exactly what I was getting so no surprises. Although I love my car there are some things that do bother me a bit but certainly not enough to make me not enjoy the car a significant amount. My issues are:
1. I wish there's an actual temperature gage rather than just a blue temp light that goes off when the engine warms up.
2. No 12v or USB plug up front under the center console. In my 3s Touring there's a fantastic rubber covered surface perfect for my cell phone but there's no way for me to plug it in without running a cord from the inside of the center arm rest.
3. Only the driver side window has auto up and down. I wish at least the front passenger side has that feature as well.
4. I (driver) can't control the power windows when I lock them. I have a 5 y/o who just loves to push buttons, pull levers, etc. so I have to lock the windows. But when I do that I can't open any of the other windows without having to unlock them. With my other car all windows are auto up/down and I can still control all the windows when I lock them.
5. No ambiant light.
6. Door pockets only good for water bottle.
7. Not able to only turn on the rear dome light.
8. Back-up camera quality isn't that great and no active guide lines (the guide lines don't move with the steering of the front wheels).
Now, most of those things probably wouldn't be an issue if it weren't for my other car. It may be a bit unfair but I'm comparing the Mazda 3 with a luxury car that costs a lot more but like I said, I love my Mazda 3 and those "issues" are just minor things that don't deminish my love and enjoyment of my Mazda.