I would advise giving people a second chance (and maybe even a third). In regards to that elusive first meeting, some people (mostly women, from my experience... but I'm sure it happens on both sides ) expect there to be a HUGE spark or large dose of that undefinable CHEMISTRY to knock them off their feet. When that doesn't happen they continue the night or weekend just fine, but when it's over you may exchange a message/phone call or two, but they generally have discerned that the two of you are not a match.
Sometimes it takes time for chemistry to develop, so please folks, give it some time.
One more thing... meet sooner rather than later. If you give it too much time it's natural and probably subconscious to effectively assume the best or fill in the blanks of what you don't know yet about this person from your fantasy (for lack of a better term right now). You can't really know someone until you meet and if it goes well... make sure to meet in person as often as you can.
Good luck to all. God bless each of us.