I absolutely love my male ragdoll! He always wants to go outside, so we struck a deal, he can go out on the porch, as long as he doesn't jump off and he doesn't try to escape out the doors.
Getting them as kittens...it (he, you said you want a male) will be absolutely adorable. Ragdolls don't get much color until later...like 6 months and their color darkens for 2 years or so. He will go through a teenager stage!
Here's an interesting article on vaccination. Vaccines for Cats: We Need to Stop Overvaccinating by Lisa A. Pierson, DVM :: Vaccines are very important but do carry risks
Something important to remember is that your vet is not necessarily studying current reports on stuff. They are busy, often working with many different species and it is easy to just do things the way they always have been done.
Something else to think about is food. Raw/cooked/home prepared can
be the best with some education
on the nutritional needs of a cat. But, you can be miles ahead by avoiding grains in food as much as possible. Cats are obligate carnivores and as such are not made to routinely received nutrition from plant sources. Person experience...when I bought my ragdoll, his breeder was feeding Iams. I switched to Blue Buffalo/Nutro/Innova...His coat was rough and not anywhere near as silky and luxurious as a ragdoll's is supposed to be. Now...amazing. I adopted a cat from the local shelter. Obviously they use whatever people will donate but actually prefer a brand where the first two ingrediants are corn products. Her coat was AWFUL! Now, soft, silky and so perfect. She also picked up to a healthy weight. Again, vets will usually reccommend whatever the food company spends their money studying. I read that they don't spend much more than a week or so on nutrition (I have never been to vet school) in their 4+ years. So again, some may stay up to date on this stuff, but many will go along with the norm.
But mostly, you'll love it! I love my cats!