People using GMRS don't really "ragchew" like they do with ham. With my ham mobile, I can kill an hour's drive just by announcing my call sign as people reply just to talk. With GMRS, they're usually using between equipment like lawn or farm tractors, within an off-road club on an excursion, or using to talk to their family members around the immediate vicinity. They say something to someone spefically, not really just to anyone (even though they are often overheard by others). Almost a culture thing. Still, I'd encourage you to toss out your call sign if you're just hoping that someone will come back for a conversation, nothing wrong with that. If you ask for a "repeater check" people will often reply to you and then you can ask 'em a question and get the ball rolling. Or, you can say: "This is WXYZ123, anyone out there for a brief hello?" Not sure why but around New England - and maybe everywhere, I'm rather new to GMRS after having my ham general license for a while now - people seem to use it to say something specific to someone specific. Very little action on my local repeaters and usually, when I do hear something, it's of the nature I just described.