Good for you Nilla Wafer! taking responsibility to do the basics and learn enough to fix 90% of your own system issues is great.
As to fiddling with that is fine if you employ a backup strategy for your OS and Data.
I use Redo Backup.http://redobackup.org/
LiveCD and backup my partitions. That way anything goes wrong can restore your partitions quickly.
It's a easier dumb downed version of Clonezilla which many others also use for backing up their partitions.
I just had my KDE 4.10.5 go bonkers when it upgraded to 4.11 and funny things like my Clementine music player started acting wonky and strange. Also trying to install widgets was broken.
Luckily I had backed up my 4.10.5 / root and /home partitions before allowing major upgrades.
And just now rolled my working great 4.10.5 which took 10 mins with Redo backup.
Also allows your to intall different distro's in same partitions and can even back those up.
I have like 6 different linux distro's partitions backed up to external usb including my Win7,Winxp partitions as triple boot.
And can swap on the fly or restore to latest backup quickly and without Heartbreak!
Or if Hardrive dies can swap in a new drive and restore the partitions ready to go in 30 mins for my triple boot setup