I had a liver biopsy about a year and a half ago because my enzymes were elevated on and off for quite some time. I heard all this horrible stuff about it but it was nothing compared to other tests I've had done! I didn't even feel them do the biopsy...they were like, "we're almost done" and I didn't even know they'd stuck it in there. I was a little sore for a few days afterwards...biggest complaint was that I couldn't do abs at the gym for a week or so.
I did have other liver tests done before the biopsy - an ERCP and MCRP and I don't remember which one (I think ERCP), but one of them caused me to get pancreatitis and I ended up in the hospital for 3 days with no food or water allowed and missed my sister's baby shower that I was supposed to be hosting. So, I would choose the biopsy over the ERCP anyday.
Crohn's Disease, Acid Reflux/Gastritis, Hashimoto's Thyroiditis, Endometriosis, Arthritis, Depression/Anxiety. Too many meds to list them all. =)