I just returned to the game OP, but it is the same in all mmos. Few people like to tank because you really have the most responsibility of anyone in the group. You have to lead, you have to hold aggro and you have to be well-geared.
Also you have to be prepared for being blamed when virtually anything goes wrong, even if you are doing everything right.
I would love to roll up a tanking Vanguard but am going to pass as I won't have the gear and I won't know the fights. Will stick to a dps or support class first time around and maybe do a tank second time around.
Good for you though, get the best gear you can for your level, hold aggro as best you can and learn as you go. If people don't like it, they can find a new tank or roll one themselves