Recommending

I recommend...

It is here where you will find that I can be quite useful, for I may not have access to every tune in the world, I am a little more reliable than certain search engines and words of other, (i.e. tastekid, yahoo answers).

These are a few things off of the top of my head that are similar to each other.

Today I'm going by the leadsinger's voice. So if you like any of the following, you should also enjoy any and every other artist listed on that line.

Nirvana, Seether, Hinder, Theory of a Deadman.

Evanescence, Noctura, Within Temptation, possibly Sirennia.

Lacuna Coil, Eowyn, Ravenscry, Krypteria, possibly Tristania and if you like Tristania, you should enjoy Epica.

Paramore, Hey Monday, VersaEmerge. (I personally find that some Breaking Benjamin songs remind me of Paramore.

Trapt, Egypt Central.

At times Shinedown and Daughtry have similarities. Adelitas Way.

Tool, Puscifier, and A Perfect Circle, all have the same lead singer. (Puscifer songs are offensive...Tool has it's moments as well, and A Perfect Circle went political on one album)

Kamelot, Machinehead. System of the Down. (This is my sister's idea, not mine).

Creed, Pearl Jam, Scott Stapp, you also might like, Alice in Chains, Taproot.

This one is a little out there... Pantera, Stemm.
If you like Stemm, the first Drowning Pool album is similar enough.

If you want some more personalized answers, I have nothing but time, and even if I can't help, it wouldn't hurt to ask.