Exhuminator

The camera is the deciding factor for me. First person or fixed perspective camera stuff still plays well. Games with a floating camera are a complete mixed bag. Some of those old PS1 and N64 games' cameras are a nightmare.

For me its Beneath Apple Manor. I beat the original 1978 version not too long ago, and had a lot of fun.

Currently the Switch does not offer enough exclusives to displace my 3DS. Furthermore, the 3DS library caters to genres which are under represented on the Switch at this time.