There's only two of those yellow band Columbus cigars (whatever the hell they are) in my humi that I am going to have a hard time lighting.
Other than that, any occasion where I'm with more than just me smoking can be cause to light a special cigar.
I admit I do have a tough time lighting special cigars just by myself. Not as much fun alone (my personal feeling) and no one to share it with.
I do enjoy the collecting and saving, but only because I know 20-30+ year old cigars
can be(not always) some of the best, and I intend to save a large amount of my cigars that long for that reason.