I made a double recipe of the Tiramisu. A dozen egg yolks, two pounds of Mascarpone cheese, two shots of esspresso and about a cup of Bailey's. The ladyfingers were soaked in equal amounts of esspresso and Bailey's.
The custard didn't thicken as much as I would have liked and to me the Bailey's flavor didn't come through as much as I wanted. But that's just being nitpicky.
It was amazing!
Next time I may cook the custard or just add a little gelatin to help it thicken like a panna cota.
I've made tiramisu with no spirits, with Amaretto and now with Bailey's. The Amaretto flavor comes through a little better but I still preferred the Irish Cream version.
Maybe if I had Irish Whiskey I'd skip the Bailey's and add it directly to the custard. All the other ingredients are already there.

Good coffee, good weed, and time on my hands...