We started out getting every vaccine on schedule. It didn't occur to us to question the schedule, bcause our pediatrician was recommending it, and we liked and trusted this pediatrician (and we still do). We did ask about risks, and were told that risks were absolutely minimal, and that nearly all adverse reactions occurred in third-world countries with lack of proper sanitation and nutrition, in babies with obvious underlying issues, etc. (This is what our pediatrician had been taught in medical school, and this was the mantra of the large pediatric practice of which he was the junior member.)
It wasn't until our children had had several adverse reactions that we (and the pediatrician) figured out that the vaccines were what was causing the reactions. (We do not live in a third-world country, and our children were deemed healthy by the pediatrician before vaccination.)
It took several reactions for us to figure it out, because the pediatrician thought that the first reaction was a fluke. The second reaction was very different from the first reaction, so even then, he didn't make the connection--and neither did we, until later. Once we started researching the reactions our children were having, it became very clear, though.
We are lucky that our pediatrician does, finally, "get it," and is absolutely supportive of our decision to avoid further vaccinations; in fact, he offered to write medical waivers for us, and put in our childrens' charts that he is recommending avoiding future vaccines due to past adverse reactions. He even said that he does not want to see any more vaccine reactions on his watch. But we--and more importantly, our children--had to go through hell before he "got it." (The nurse--who ended up losing her job--wasn't so understanding, and treated me with scorn when I called in when our oldest was having the seizure/encephalopathy reaction; she wouldn't even let me talk to the doctor and told me that I was a hysterical new mom over-reacting, and that I should put the baby in his crib and walk away.) The reactions my children had included unconsciousness for days (happened to both the oldest and the youngest), seizure/encephalopathy, full-body rash that lasted for over 6 months, and sudden-onset food intolerance.
We are also extremely lucky that all our children recovered.
If we had known then what we know now about the risks of vaccines, I'm really not sure if we would have opted for selected/delayed vaccination schedule, or if we would have avoided vaccines entirely.