think of の意味は to have a particular opinion of something or someone です。

What do you think of the new manager?

Audiences did not think much of the movie.

参考:cambridge

Have you thought of any ways we can make our Web site more appealing?

何かいい意見はありますか?のニュアンス

新形式公式 5 Q35-37

(ある楽しい夜の思い出話をしている場面で)

I’ve often thought of that night.

New York Pediatrician Story p.30 から引用