As the title of my post suggests, it's all about freedom baby! I rooted my LG Ally (my Wife's as well, after some discussion) back in the day and haven't looked back. Now five phones later I rock a Nexus that, while stock and guaranteed to get the latest and greatest, is the best phone to go wild and crazy with development! See, Android is about choice. Yes, you can jailbreak an iPhone (not an Apple hater btw) but Apple doesn't necessarily want that. Their product is built around a set experience. Android is built around YOUR DESIRED experience (except Motorola...because they take all of the fun out of Android! LOL!). You can make it whatever you want it to be. So if rooting, flashing, etc is what you want to experience then go for it. If you enjoy your phone for what it is then Google/OEMs will have still succeeded.
I unlock the bootloader and root to: flash kernels to gain speed and/or battery life; flash ROMs which are usually ahead of the curve and contain awesome customization; flash custom boot animations that allow for that much more personalization; because sometimes it is a challenge and it is fun to learn new things; because it is an option!...so why not explore said available option?
m2¢,
jmar