Cake or Pie? Hot or cold? Depends on my mood.
I love chocolate cake, particularly if it has a good, buttercream frosting. (The lard based frostings do nothing for me.) I prefer my cake plain, maybe ice cream on the side.
Pies are great (particularly on PI Day 3.14!) I like fruit and berry pies (apple, strawberry, boysenberry, razzleberry) with a scoop of vanilla. I like the cream pies (chocolate silk, chocolate tuxedo) with just a squirt of whip cream. They've already got dairy products in them.
Same with cheese cake AKA cheese pie. No ice cream, just some whipped cream. (REAL whipped cream, thank you!)
The only pie I like heated is Apple.