My online learning experiences were the complete opposite of yours, Stephanie. The year I started my M.Ed., the instructor changed the format of the course delivery. We met face-to-face once a month, and synchronously via WebCT chat once a week. We had assigned readings and came to the chat to discuss them. There were only eight of us in the class so the number of people was manageable.
We found a great sense of community was built. Our first meeting was F2F and we met each other in person. We then went into the weekly chats being able to put "faces to names" and launched ourselves into the topic at hand. I came away from the synchronous sessions very energized and wanting to know more. I was sorely disappointed when the hour was up! We developed, what I feel, was a true learning community. We supported, encouraged, responded to, and learned from each other. The relationships we forged in that group have lasted to this day (six years later) as many of the original eight are still in contact with each other.
With our group, the personalities did not change when online or when face-to-face. I'm sorry your experience was not more positive, and I now wonder which end of the spectrum more acurately reflects the norm?