Exactly! That is where mass evangelism falls apart - it's not the evangelist's fault or the denomination's fault. Newcomers see all this fellowship and love and "glitter" during the series; and then the local churches (which means us individuals) fail to pick up the ball! Then there are those who feel they must "educate" new members in the ways of the church - warning them of jewelry and make-up and women in pants and bringing chicken to a pot luck. Plus, the affluent and the gregarious are "adopted" more easily than the shabby, quiet, and shy people.
In my way of personal evangelism, I usually become friends first by doing little things for people and taking time to develop some sort of relationship. Then I discretely work in witnessing. Some people could care less; but many are eager to discuss spiritual matters once the subject is breached. I even had a "Book" (aka Bible) Club here at work for a few years. My goal is to bring people to Jesus - not necessarily Adventism. I do invite them to church; but if they don't want to go or go and don't like it, I don't press the issue (except maybe to go to church with them sometimes; putting on the pressure to reciprocate).
Bottom line is, most people aren't that interested in what you have to say until you show them how interested you are in them as people. That way, religious conversations tend to stay conversations between friends instead of arguments between strangers.