Bourbon for me. It has sweeter, more vanilla/caramel tones vs Scotch which to me lands in 4 categories (Highland, Lowland, Speyside, Islay - each having just a hint/essence of either Citrus, Vanilla, peet etc but not enough to take away the burn).
I think Scotch is a learned taste, and I'm just not quite there yet, even with the really good stuff. And whisky - well, don't need it cuz I've got Bourbon (and when you have Bourbon and Scotch who would choose whiskey?) :-)
Not sure where you live, but there are a lot of places that specialize in one or the other and it's a good evening to go to a tasting and learn about them. You'll get to sample what makes them different and what might be a good fit for your palate. There are a lot of differences between brewers and etc. so tastings are an inexpensive way to hone in on what you might like.
It should also be said that Bourbon is made from corn - so I like to stay loyal.