When it comes to artisan chocolate, I am not very picky, I tend to go for almost any less known/less commercial brand available. However, I too prefer low sugar content and thus have a liking for less sweetened and also preferably dark or white chocolate, as opposed to milk chocolate- for the simple reason that less sugar often brings out more flavors.
If I was to talk about any specific brands, my tastes are quite diverse and include quite an array of various manufacturers: from the dark chocolate by the more exclusive confectionery line of an affordable discounter (Moser&Roth, the upscale in-house range of Lild supermarkets, preferably their dark chocolate), to the diet hypo-caloric chocolate by health food brand Schnee Koppe (no medical condition or dieting, simply like the more intense and slightly less sugared flavored), to Lindt chocolate, preferably with cocoa contents of 70% or above, to the chocolate from artisan chocolatiers like Leonidas, Bur Chocolat (the former still has a subsidiary in my town, the latter closed down their local store, but hopefully they might re-open someday), Maxim's de Paris, Michel Cluziel or Aux Chocolats.
The pleasant part is that not only big supermarket chains import both the more known and the more artisan, obscure, niche Belgian and Swiss chocolate brands, so there is quite a bit of a diversity in my town. Plus, even a few local artisan brands are being developed and launched just as we speak (even a former high school colleague of mine considers entering this business and her chocolate specialties she once invited us to sample are quite good, merely the marketing, the distribution, the publicity, the purchasing/supply etc. aspects are to be perfected), thus there is enough to choose from.
Only a few years ago, my town of residence had a quite limited and quite generic supply of chocolate brands, with the artisan segment almost entirely absent, but now the isolation seems to end and be replaced by an increasing diversification of both large-scale and niche appeal suppliers, plus, everything unobtainable in my town can be easily ordered online anyway.