What are the characteristics of modern poetry?

There are so many things to say on this subject. I would ask you to elaborate on the following points:

1. Modern(better call it Modernist) poetry is more predominantly intellectual/cerebral in its appeal, rather than emotive; Eliot and Pound would be the examples;

2. It is chiefly imagistic and involves symbolism, often private in nature; you can think of Eliot and Yeats;

3. It is often full of allusions of sorts, and inter-textual references; again Eliot is a great master;

4. It is impersonal, anti-romantic, innovative in attitudes and approaches to life; opposed to the Romanticist poetics of spontaneity and imagination;

5. It is often lexically, semantically and grammatically challenging for the uninitiated readership;

6. It rejects traditional versification and metrics to opt for free-verses and various experimental forms.