I think my biggest peeve is the cost of new kits. There is a certain manufacturer of Far East location that has a really nasty habit of introducing "new" kits every 8 to 12 months which are the same basic kit as the "old" kit but with new box art, new decals (which are usually so thick as to be useless) and a new instruction page reflecting the "changes" and the price of the kit goes up 3 to 5 dollars with each issuance. And when they introduce a truly new kit to their line, the price is usually in the absurd range. (40 bucks suggested retail for a 1/72 WW II medium bomber??? - I don't think so)
And don't tell me that the latest model is the absolutely "perfect" model. The "perfect" model shouldn't need a PE set. But one of the LHS that I frequent had the PE set on the shelves before the model showed up. And I would be willing to bet the kit has the same crappy decals that all that manufacturers kits have. Plus the cost of paint and glue. So now we have $40 for the model, $20 for the PE set, $10 for the decals and say $10 for the paint and glue. Ok, I now have $80 in a 1/72 airplane kit that isn't started and the knowledge that I could have gotten the same airplane from a different manufacturer and with a little work had about the same model when finished. And had 30 to 40 dollars that I could have spent on something else. I sometimes think that some modelers are like a lot of the people who buy 4 wheel drive SUVs. You know the ones I'm talking about, pay 5 to 6 figures for the vehicle and it never leaves the asphalt street. But it's the "in" thing to do to impress other people who can't afford one. (Don't get me wrong, I absolutely lust after a Hummvee - not one of the civilian models, but a military surplus version - I drove them for a long time in the Guard and know what they are capable of. And it ain't running on asphalt and concrete)
Sorry about ranting but had to get it off my chest.