Sorry for the long post
I have an older model Glock 17 (1992). I am quite used to its trigger. Though some might describe it as spongy, I actually enjoy it. On my Glock there doesn't really seem to be a point in the trigger pull that requires more force for it to break. It seems to simply be a matter of distance. When I pull the trigger a certain distance, the gun fires. I don't have to squeeze much HARDER. And the trigger never stops its rearward movement. Being used to this type of trigger, it was difficult for me to get used to guns that, after the initial slack was removed, required extra effort to get the trigger to break. It was weird for me to shoot a gun whose trigger does not move while I am applying more pressure to it. I shot a Les Baer (sp?) like that. After the initial take up of slack, the trigger seemed to stop moving. I flinched, like I expected it to have fired. It was quite difficult for me to retain the same grip while applying more pressure with my finger to an object (the trigger) that was not moving. I didn't like it. I could probably get quite used to it and would most likely love it and appreciate why everyone else loves it. But, I didn't like it because I wasn't used to it.
I haven't been shooting my Glock since I recently acquired a couple of CZs (a P-01 and a 97B). With the CZs there is definitely a point where I become aware that the gun is about to fire. CZs do not have the best triggers. My P-01 has some grittiness, but the pull is pretty consistent.
BTW, I am more accurate with an XD than I am with my Glock, though I do not own an XD and rarely ever shoot one.
Shot an HK USP Match .45 that had an AWESOME trigger! Even the double action trigger was smooth and easy. Best trigger I ever encountered.