Well - in most cases the top 10% of a tournament receive payout. At maximum the top 15%. All big poker sites have similar payout structures. Therefore it's not a good way to choose your tournaments (you would have to choose all of them).
I choose the tournaments that seem most profitable. In the end it's your personal taste. I pick a specific buyin range in which I play every tournament that starts on the big sites during my session time. In addition I normally add a few lower buyin turbo's/superturbo's/hyperturbo's since they are good for my hourly. Last but not least I add some big field tournaments below my buyin range like the Big11 since they seem most profitable.
Hope I was able to help you 
If you have any further questions feel free to ask.
Regards,
Asaban