Writing an e-mail to your friend
Paragraph 1 - intro/why you're writing:
How are you? I'm doing fine. You were asking me about ....., and I have given it some thought.
Paragraph 2 - content/what you want to share:
Some popular vloggers I follow are ...
What I really like about them etc.
Paragraph 3 - conclusion/nice remark to be in touch/take care etc.:
All in all, I really like/absolutely adore/hate etc. Would you agree with me on this?
Hope to hear from you soon. Looking forward to hearing from you! Take care! Etc.
Best wishes/Kind regards/Ciao (informal)/Love (when you know someone really well)