Even gay dudes know that a little weight in the ass on a woman is good. Freddy Mercury of Queen sang "Fat bottom girls, you make the rockin' world go 'round"!
Seriously, if she's got a pretty face and she treats you well, and you get along, I don't see any reason why you should have a problem.
As for internet dating.. I married my internet sweetheart. More than 3 happy years so far. No fighting, no bullshit. Arguments sometimes, but never fighting.
Some people may have had bad experiences, but think about it this way: you hear about bad internet experiences, and they spread like wildfire, but you don't hear about long time friends, fun times and marriages that come about. There are alot of buddies on this forum who probably live in the same towns and would not know each other if it was not for the internet.
I don't think you have anything to lose, Will, unless she turns out to be crazy.