Your friend knows his self and his self control when it comes to gambling so maybe that's also the reason why he'd rather stay on the online casino that he knows than trying out the new ones. It's also understandable that it could get you to spend more on gambling.

As for me, I'm open to trying out other websites that I haven't explored yet especially if I've been hearing good reviews from other gamblers. But if it's a new online casino, I feel like I'd be reluctant to try it out... But since I'm currently trying to limit my spendings in gambling, I am not into exploring other casinos right now. But if I do have extra money I can spend on gambling, it would also be fun to explore other website. Understanding their UI and stuff won't be a problem since that's part of exploring.