Glock is Good, Glock is Great...
Like shoes, you have to try them on yourself. I rented the Glock 19 and XD9 side by side during two trips to the range. Both times I left saying I like the XD9 better.
The grip angles are different and the bore is lower on the Glock. Functionally they are almost the same so there was no real grounds for comparison there. I do like having the grip safety on the XD9 since it's a passive safety device. You don't have to flick anything to disengage the safety yet it automatically engages when you holster the gun.
If you're just looking for a popular vote, check out the XD forums. You'll find more and more new members who clearly state they used to be die hard Glock fans and are now switching to XDs.
The safety is automatically engaged on a Glock when you holster it, too, as logn as you don't leave your finger on the trigger when you do it... which also would mean that the web of your hand was still on the grip. Right? What I'm saying is, if you train right and do right, they're functionally the same.
I can't help but feel like the XD craze is partly everyone getting on something new, partly the (admittedly well-executed) propaganda coming from Springfield Armory, and partly elitists having to have something different / 'better' than the masses.
Grip angles from the Glock to the XD to my 1911? I don't notice the difference. They all point naturally in my hand. The low bore axis of the Glock is very nice, but I could have that with a Makarov (also an extremely nice-pointing and shooting pistol, and cheap to boot!).
The reasons to buy a Glock are:
1. They are tested to death and they always go bang.
2. They are prolific; you can get any kind of holster / accessories you can imagine, and with all the competition for the market Glock stuff is semi-reasonably priced. You will always be able to get parts / work done on a Glock.
3. Again, the larger market means plentiful magazines in the right capacities for (sorta') reasonable prices.
4. Having probably the same pistol as the local constabulary makes you seem less of a 'hitman / gun- nut' in a legal situation. This is a negligible reason (until you get to court, when any help will be welcome in the face of insane litigation).
5. Glock pistols have a G.E.D.-simple manual of arms. Carry with a round in the pipe, draw weapon and identify / index threat and pull trigger, repeat until threat is neutralized. K.I.S.S. rule in full effect. This is probably the best reason to buy a Glock.
If you feel that Glock triggers are no good, you need to invest in about 300 rounds of ammo and maybe some training. Personally, I have no trouble making accurate hits with my Glocks off-hand out to 20 yards and sometimes further (if you shoot someone at this distance or further, you may have difficulty justifying them as a threat in court).
If I could only own one pistol (perish the thought!!) I would probably keep either my Glock 19 or Glock 23, whichever one I was assured would be easiest to get / manufacture ammo for (leaning towards the G23 because of the bigger holes). They aren't my prettiest guns, but they are an excellent combination of shootability, firepower, and concealability, and of course reliability.