I've tried about ten different strains in my time (that I could find conclusive, solid evidence about; I either purchased the seeds from a bank, got them as freebies from a seed bank purchase, or got them from a medical breeder. I can't even count the number of mystery batches I've tried in my time to be honest.)
Favorite Indica or Indica dom thus far would have to be either Berry Bomb (Bomb Seeds), Blue Rhino (Positronics) or Punky Lion (Samsara)
Favorite Sativa or Sativa dom thus far would have to be either Medi Bomb #2 (Bomb Seeds) or C99 (Female Seeds)
That said, I am no cannabis expert. I am just one person who grows enough to provide for myself and an immediate loved one. What works for me might not work for everyone, but I'm curious to see how other people answer this thread.