"Regrets, I've had a few, but then again, too few to mention.
I did, what I had to do, and saw it through, without exemption."
When I look back over my relatively short life thus far, I really have very, very few things I regret or wish I would have done differently. When I do, it's usually in the form of a "what if I had..." instead of a "I wish I had..." More a curiosity than a true regret, I suppose. My regrets also almost universally entail some experience I had been presented with that I didn't take advantage of at the time.
As I think about it, none of them are interesting enough to force you to read about, so I'll spare the details and jump to the conclusion: I've had a good run, and I'm looking forward to the second half.