My G19 & P226 seem to both favor 124 gr. anything's. The Glock also likes fast 115 gr. loads. I used to love the old Federal 124 gr. Nyclad round, this was accurate in both guns, but I don't think it's made anymore.
There are also "+P+" rounds as well. Mostly seen in LE circles but I believe you can get them.
My favorite loads are the ones on sale that day. I'm not a good enough shot to be able to tell the difference. I will say however that I haven't bought any in quite some time. I've been shooting 115gr nosler HP's I reloaded. They seem to shoot about the same as everything else I sent down the pipe.