I have been using Optima 'Gold' Strings now since about 1995 (when they were still called 'Maxima', it was that long ago!) and I haven't used anything else since. I find they sound great, hold their tuning, and I almost never break them.
They also last a very long time, and since I hate changing strings, this is a bonus. Unfortunately they are now getting very expensive to buy, and I have to buy them in bulk from Thomann to get a reasonable price.
I would like to be able to get a custom set ideally so I can get a more balanced set (hopefully they will do that in the future), but since they are now so expensive I don't think I'll be able to buy them in the future, unfortunately.
I may have to change to the 'Chrome' strings they make instead, to make them more cost effective. I'd rather not have to do that, but times are hard and I may have no choice.