What were Mozart's best 3 works?

The Requiem
Don Giovanni
Jupiter Symphony

There are so many great works by Mozart . My favorite ones are :
Requiem
Symphony Concertante for violin and viola
The Magic Flute .

Requiem,
Mass in C Minor (although I think people hardly ever listen to it)
The Magic Flute

If you make me choose - the Requiem; Don Giovanni; toss up between several piano concertos and symphonies. Sounds like you need homework help - this question is really specious.

He has so many good works, name only 3 is not really fair. Personally, i love:
Minuet in G
Sonata in C major K. 545
Piano Sonata No. 11 in A major