I sell my losers quickly because I always have gains or income to use against my rare losses. If I loved a depressed stock, I'd buy it back in 30 days. I can't ever recall doing that tho.
Alas, I've had no losers in recent years. Nice situation, except at tax time. Most of my blue chips are at record highs, along with the broad market today. I have huge gains in almost everything I own.
One more bit of advice: sell ALL your penny stocks tomorrow morning, or sooner if possible (LOL). Never buy another one.