My advice would be to think it through before the consultation. If you want changes, think them through and send a single email. A good tattoo artist is busy. What if all their clients sent multiple emails?
Yes, you should get the tattoo you want, but you also need to trust your artist. For my first sleeve I said, “Japanese, anything you want.” It turned out great. Same with my back. All my other work I threw out ideas, but what he came up with was way better than I imagined.