I don't know you, but I am not into rounded inputs...for important information. Is like they miss some formality or something, too playful. They also give me this perception of feeling out of place. Despite rounded buttons are more clickable if rounded. Does it happend to you?
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It feels "unfinished" because those round forms look similar to the default CSS rules browsers apply when no other styling is present.
Oh wait yeah sorry I goofed. I don't remember what I'm thinking of - maybe basic border radius then when you get started :P