First off, 'Cyrano de Bergerac' and 'O me, O life!' are both wonderful works.
Personally, I absolutely love 'I Wandered Lonely as a Cloud' by William Wordsworth:
I wandered lonely as a cloud
That floats on high o'er vales and hills,
When all at once I saw a crowd,
A host, of golden daffodils;
Beside the lake, beneath the trees,
Fluttering and dancing in the breeze.
Continuous as the stars that shine
And twinkle on the milky way,
They stretched in never-ending line
Along the margin of a bay:
Ten thousand saw I at a glance,
Tossing their heads in sprightly dance.
The waves beside them danced; but they
Out-did the sparkling waves in glee:
A poet could not but be gay,
In such a jocund company:
I gazed--and gazed--but little thought
What wealth the show to me had brought:
For oft, when on my couch I lie
In vacant or in pensive mood,
They flash upon that inward eye
Which is the bliss of solitude;
And then my heart with pleasure fills,
And dances with the daffodils.
To me, this is the quintessence of 'sprightly' poetry, so to say. It is in essence a great focus of my beliefs, of the lively poetic spirit, and of many other sundry things.
The eighteenth of Shakespeare's 'Sonnets' (which, if I had to choose only one work, I'd say this is his best and perhaps the best piece of literature I have ever read) is probably the best of them all, and the most famous.
Shall I compare thee to a summer's day?
Thou art more lovely and more temperate:
Rough winds do shake the darling buds of May,
And summer's lease hath all too short a date:
Sometime too hot the eye of heaven shines,
And often is his gold complexion dimm'd;
And every fair from fair sometime declines,
By chance or nature's changing course untrimm'd;
But thy eternal summer shall not fade
Nor lose possession of that fair thou owest;
Nor shall Death brag thou wander'st in his shade,
When in eternal lines to time thou growest:
So long as men can breathe or eyes can see,
So long lives this and this gives life to thee.
This is the great turning point, where the speaker stops his harsh attitude toward the lead character in wanting him to marry and conceive, and begins truly describing love as it should be. I love Shakespeare's language and I often try some similar techniques myself, and most of my writings are greatly inspired by Shakespeare's.