What bike shoes do you train in?

I train and race in tri shoes. I do use the older pair on the trainer, mostly just out of laziness.  I much prefer the freedom of wearing tri shoes (bare feet, only one flap).

I wear my mountain bike shoes with my other bikes, but the racing bike gets the tri shoes only.   They do have different pedals.

I train and race in Specialized Skunk Works Trivents.

I didn't want to spend so much for tri shoes and I prefer black colored shoes;  but the Skunk Works fit me perfectly and here in Miami the openess (coolness) of the SW is perfect for me.  These are the first bike shoes I could ride 50+ miles with no socks. My GF says the red shoes makes me look fast, so how could I so no?

I bagged my road shoes 4 or 5 years ago, and have used tri shoes exclusively ever since.  Even on spin bikes.

stopped using my road shoes this year.  use only my Giro Mele Tri shoes now.

they fit better so i didn't see why not to use them exclusively.

When I purchased my first pair of shoes this passed fall the sales person said that road bike shoes offer greater stability over the Tri shoes. As it happened, non of the road bike shoes fit my feet correctly so I bought a pair of Shimano Tri shoes (forget which model). I have a short foot with a narrow ankle but fat toe box.

I would just stick with what is comfortable and not worry about it.

I now train and race in LG Tri-Lite carbon sole.   I was having problems with my knees and after a lot of time trying to figure out what was causing the issue it turned out it was the stiffness of the sole of my shoes.   Switched from other LG tri shoe to the carbon sole and a lot stiffer and problem went away almost overnight.

I initially had become caught up into the weight of the shoes and purchased something light and inexpensive without considering the consequences.  Will not make that mistake again.