Do you prefer trading stock or options? Are you a technical analyst or probability trader?
I've used Thinkorswim for the past 3 years but have moved most of my accounts to Tastyworks.
I prefer Thinkorswim for charting graphs, but Tastyworks provides the best rates available anywhere.
If you haven't heard of Tastytrade, you should check them out!
https://www.tdameritrade.com
https://tastyworks.com
https://www.tastytrade.com