@evan
Adenine has so many more uses. Even though the others make cute letters. The fact that it is in NADH. NADPH, and ATP make it just the creme de la creme of nucleotides.
And the double rings. Love 'em.
I know Guanine has it too, but GTP ... well, it just doesn't quite measure up, if you know what I mean.
And the way ATP can bind to both Thiamine and Uracil makes it kinda Bi.
Probably more than you bargained for with this question, but I did put Likes DNA in my profile, so go figure. 😝