My doctor has been very open to my goals and concerns. I got lucky in that I was shuffled over to her because she was known to have experience treating trans people (back when that was a bit more obscure), so I didn't have to deal with any weird preconceptions. She always listens and she is very clear about risks but she trusts me when I want to take chances.
I keep my T at the starting dose that most transguys on T are familiar with. My blood levels are below what would be normal for a cisguy, but most health professionals react with alarm when they see I'm taking it. I have high blood pressure, "pre-diabetes," kinda severe PTSD, lots of chronic pain and metal in my body, and I get HIV tests often enough that it's obvious I sleep around. I see my doctor regularly and also communicate by phone and email and she lets me take the lead on my treatment as long as I don't act stupid. Even with serious risks she listens to me about what my goals are and what I'm willing to sacrifice.
For me personally I care about health more than beauty, but also I care about being absolutely male in any way I can. I don't care if I go bald or have a higher risk of heart disease or whatever if that's what I would have had if I had been born a cisguy. I don't care how many years get shaved off my life by transition. I don't care if I get zits or if my orgasms stop being as awesome as they are for women. I don't care if I get a beergut (which I did get despite eating vegan and walking a couple miles a day) or if I can't sing like I used to. I literally have no health goals that are more important than becoming a regular guy as much as possible. My doctor has been very practical and helpful with this.
I admit that my intense focus on caring for my kid makes it easier for healthcare providers to do whatever they feel is best. I don't have a career or family of my own or even much self-interest. They could all be quacks and it wouldn't really matter as long as my kid stays out of jail.
I've been on T for I think at least 4 years. My masculinization was drastic and quick at first but it plateaued within a year or so. Since then my muscles have gotten harder and my emotions have subsided and the way I smell has changed a lot. My veins look bigger and the hair on my arms is blacker and more extensive.
Most of my health problems have gotten worse on T. It's worth it, but I'm not going to pretend T is all miracles and rainbows and unicorns. It's all that for my mental health though for sure. I'm way more stable than I was when I tried to be a girl.