I like the simplicity and composition of photo #1. The bokeh background compliments the subject well.
Pic 3 just doesn't work in landscape mode. Pictures 3 & 4 have just too busy of backgrounds with those bright lights.
Also picture 4 the Tulip is too far off center, and just seems out of balance.
Pictures 5 & 6 just don't work well in a landscape format.
Now picture 7 is by far the best of the set. I really like the landscape mode, and you used it to it's full advantage with the stem leading the viewer to the Tulip.