What bands have you got into because of Opeth?

Pretty much anything with growling/screaming vocals...

Katatonia
Agalloch
Anathema
Borknagar
Vintersorg
Soilwork
Porcupine Tree (not much, though)
Emperor

Then, later...

Bloodbath (as a result of Opeth/Katatonia)
Diabolical Masquerade (as a result of Katatonia, which was a result of Opeth)
Dissection (hard to say why, but if I hadn't heard Opeth, I wouldn't like this)
Asmegin (more a result of Vintersorg, who was a result of Blind Guardian/Opeth)

Yeah, basically Opeth is the reason that I like most of my current favorite music, because most of my current favorite music has screaming/growling. Also, their sound was very influential. Opeth also, by the way, greatly affected the music that I write.
 
Band (Factor inspiring purchase)

Porcupine Tree (Damnation tour)
Katatonia (Peter interview)
Anathema (Related bands on allmusic.com)
Bloodbath (Mikael, Katatonia)
Nile (Mikael interview)
Moonspell (Lamentations tour)
Dying Fetus (recommendations from this forum. Thank you!)
Agalloch (this forum)
Novembre (this forum)
 
Katatonia, October Tide, Bloodbath, Porcupine Tree, Diabolical Masquerade, Aviv Gefen, All of Dan Swano's bands, Cradle of Filth, Nevermore, Devildriver, Madder Mortem, Suffocation, Morbid Angel.... hell too many to count
 
apart from PT and Bloodbath etc. I wouldn't say I got into many bands because of Opeth, but they were one of the first bands I found when I started exploring extreme metal.