Thanks for your kind comments everybody. Much appreciated.
#Maciek: Nr.2 was framed like this because the sun was very low and there was a good view inside the cockpit area, which for me was the most important part of the picture. I think there's just enough of the engines visible to give a good impression of the aircraft as a whole. Nr.5 is just an atmospheric shot of wintry Schiphol, a sight that we don't experience a lot over here. The aircraft is part of the picture, but not the only part. I always try to put some variety into my aircraft pictures.
Thanks for your criticism and I hope my answer will do for you.