* Robert Frost - known for his realistic depictions of rural New England life, often exploring themes of nature, isolation, and the human condition.
* Robert Burns - a Scottish poet known for his romantic and often humorous works, including "Auld Lang Syne" and "Tam o' Shanter".
* Robert Bridges - an English poet known for his formal style and his interest in classical literature and music.
* Robert Browning - a British poet known for his dramatic monologues and his complex characters.
* Robert Lowell - an American poet known for his confessional style and his exploration of personal and political themes.
It's difficult to say what all poems by "Robert" poets have in common. They come from different time periods, cultures, and have different styles.
To better answer your question, you might consider:
* Specifying a particular Robert (e.g., "Robert Frost's poems")
* Specifying a theme or style (e.g., "What do Robert Frost's nature poems have in common?")
Let me know if you have a more specific question, and I'll be happy to help.