Vorph
Silver Baronet of the Realm
I'd say 'Quality' builds are by far the most popular, especially for new players or a game that's just been released.focus on strength or dex, but not both
Also, I'd suggest the uchigatana for any dex build even if you don't start as a samurai. Not quite as easy to get as the flail, but it's not far from the start either. Unsheathe is insanely powerful, and it works exceptionally well for guard counters and charge attacks too. Plus it's got built-in bleed which is really handy for all the annoying fuckers that take vastly reduced damage from normal attacks.
The flail isn't bad, especially for clearing out the mine (Limgrave Tunnels) early on for a bunch of smithing stones, since you can one-shot them with a strike weapon while a slash/pierce one barely takes off 25%. I wouldn't waste any upgrades on it though.