User blog comment:Antares2/Artistic Vision?/@comment-24174486-20120816174241

"in Mass Effect 2 you got to fight the Blue Suns, Eclipse, Blood Pack, Geth, Batarian Extremists, Collectors, Mechs, Feral Hunters, a Yahg, a Human Reaper, Husks and wild animals!"

So in other words, you got to fight people with guns, people with guns, people with guns, people with guns, people with guns, people with guns, people with guns, people with guns, two bosses, a type of enemy that were expanded on in ME3, and wild animals.

Don't mistake "enemy variety" in "variety of appearance". One of ME3's best attributes is the variety of enemy types within each faction and how each type of enemy is capable of working together to cover their strengths and weaknesses.