Unofficial watch face shout out for NEAT WEATHER WATCHFACE which appears to be relatively new. IMHO best designed and optimised watch face in the IQ Store, feature rich and I'm running at 0.4% p/h battery consumption.
Not too often tbh. I never liked Crystal, it just didnt sit right with me. My previous favourite was SkyTracker but the dev hasnt really done much more with it.
This one ticks all the boxes for me. Quality of graphics, anti-aliasing, neatness and battery optimisation so I'm pretty happy. He is charging 2 Euro for unlocking the extra features, but I tipped him with 5 Euro.