My favorite so far is clearly #49.

Subliminal message

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

Please be relevant, helpful & nice!

End of subliminal message

Please be reverent, healthful & wise!

I can do that too:

Police bee elephant, yelp fool & mice!

End of subliminal message

Please be revenant, stealthful & gneiss!

Also Qb4# is another option. Agreed, good puzzles. 

Well, puzzling puzzles anyway... 

Well, #71 comes close to being sound anyway (there's a mate in 4 with 1 b4 Ka6 2 Ra8+ Kb5 3 Ra5+ Kc6 4 Rc5).

#72 is not a mate in 3

It is the way Black played it. 

Rf6 ^__^ Mate in 3 also !

So easy !

huh?

On puzzle #19, Bb4# seems simpler!

Yes, but simplest isn't always best.

Huh? What could be better than winning the match?

I was being wry. 

...