Some keep them stock - I'll usually keep it stock or close to it..

Sometimes though, i'll buy some add-ons.

Extended slide lock lever: It comes stock with some Glocks already, I'll usually purchase one for Glocks I purchase right off the bat. I'm used to them now so now I gotta have em.

Internals: Nah, I'll leave that to Glock to decide what's best in there.

Mag base: I'll use the +0 ones that extend the grip down an inch but not the +1 or +2 ones since I don't need to worry about if i'll be posting up about a failure to fire because of it..

night sights
some I have installed the 3.5# connector

on my G17 "race" gun that I'm putting together.....lots of stuff

Night sights, I have a +0 on the mag thats in my G26 and a +2 on the spare mag that I carry. Ive noticed that the +2 makes the grip the same length as my G19.
The triggers are just fine for me.

All of my competion iron sighted Glocks now have Dawson adjustables with FO front. I do have a G24C with a Carver mounted C-More.

3.5 connector
Extended slide Lock Lever
Stainless steel rod

I was not fond of the extended mag release.

I want a laser sight on my 23 but I dont want to spend too much.

Do you guys think this is good enough?

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

Im not familiar with that brand. I would go with Crimson Trace if I wer to put a laser on any of my Glocks.
Im not a laser fan myself. I know you said you didnt want to spend alot and thats just my opinion.

Sights. Gonna put some night sights on my 17. That is all I will ever change on my Glock. Why mess with perfection IMO

All I added was Talon Grips to my 19.

Hogue grips and a plug for now.