I wasn't aware there was a "hate for half rounds".
So you tried one set of strings and wrote off an entire style of string?
On the flip side to that I have D'Addario half rounds on all my gigging basses and love them, they do exactly what want from a string.
Generalising, I like the high tension of flats but they're too dull, I like the tone of old rounds but they're too low in tension and if you fit a new set it's months before they sound how I like. Enter D'Addario half rounds, high tension and sound like an old round straight out of the packet, the tone control moves them between flats and rounds, perfection.
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