My favourite own compositions? This is a very difficult question.
In general I prefer my simple, melodic and melancholic pieces.
So far I have composed nearly 100 pieces, all oft hem for piano solo.
Most oft hem are on SoundCloud and Free-Scores.com
Here are my current personal favorites.
petit rêve triste - sad little dream – my personal alltime favorite...
http://soundcloud.com/stephan-beneking/beneking-petit-r-ve-triste
Millenium Elegie – composed fort he turn oft he Millenium
http://soundcloud.com/stephan-beneking/beneking-elegie-du-millenium
Petr Ginz – for the story of Petr Ginz, that touched me most
http://soundcloud.com/stephan-beneking/petr-ginz
Phantaisie sol mineur - Fantasy G minor
http://soundcloud.com/stephan-beneking/beneking-phantaisie-sol-mineur
Reve en ut diese mineur - dream in C sharp minor
http://www.youngcomposers.com/music/1217/reve-en-ut-diese-mineur-dream-in-c-sharp-minor/
Petites Reves bizarres 18 – out of 22 dreamlets (also here on YC)
http://www.youngcomposers.com/music/1156/strange-little-dream-no-18-petit-reve-bizarre/
Petites Reves bizarres 14
http://www.youngcomposers.com/music/1155/strange-little-dream-no-14-petit-reve-bizarre/
Dance on icy Waters I
http://www.youngcomposers.com/music/1412/dance-on-icy-waters-i-dream-g-minor/
And my Preludes fantasies No 1 and 2 (played by myself)
http://www.youngcomposers.com/music/2685/prelude-fantaisie-no-1/
http://www.youngcomposers.com/music/2759/prelude-fantaisie-no-2/