DOTA? Nope. Well. Maybe.
DOTA was a big deal, it took a popular RTS and rode it's coat-tails to success. The big winners for this Action RTS RPG MMO Game for Personal Computers is the play-times, you can play it for 15 min to 45 min per match. The graphics are great (comparable to Heroes of Newerth) and the gameplay mechanics are NEW; the itemization is great and easy to access via the 1 shop menu. There are many heroes (lots), lot's of purchasable things, and a great PVP.NET system to play with friends.
Things this game lacks: shoddy matchmaking, bloom effects, in-game voice chat, and kind of a ridiculous ratio on free game points (get from winning/playing) and bought items (cash money).
Overall a great game to hop into once in awhile or play with friends. It will also make you angry/happy.