pics or vids content

[Litwa]

Hi,
i have a question, have over 30 free sites with pictoral content only, it uses about 50% of my 50 GB transfer/month, so far. My skills are still quile low so i'm not even thinking abut starting building tgp.
So.. what content is "better" any ratio differences?
What are the ups and downs of both, vids and pics sites?
Should i start making vids sites?
What You prefer - in bussiness - and why (i think that surfers prefer vids...)

thx,
Litwa