What are your favourite financial asset classes that you like to invest in and why?

I like situations that require multi-asset knowledge, as it makes for a more interesting discussion.

For example, a couple of years ago, Sears was close to bankrupcy. I had stumbled upon a trade where you could buy Sears bonds, whose yield could more than cover the cost of buying Sears stock puts (to fully hedged out the bond's face value).

In the event of a liquidation, the equity would be wiped out first, favouring the owner of the put option.

In the event of no liquidation, the bond's yield was enough to provide the investor with a net return (after paying for the put option's premium).

It's interesting to discuss such situations to check if I had made any blind spots.