I like Ares. If you can communicate your Ult with others, it's fun to kill 3-4 folks at once, but most good players see Ares on the opposite team and promptly buy beads to counter.
Fun story, Last night I played an Assault and the skill disparity between our team and theirs was amazing laughable. I was Xbalanque (not my fav) and was doing ok. Our He Bo was smoking fools, diving towers and had like 6 kills before his first death and that was because he was being super aggressive with tower diving. Me and Ao Kuang were doing well. Our Thor was like 0-6 (he would ult into the pack of 5 enemies by a tower as we're running back to regroup) and our Hades was like 1-5. After going 0-10, our Thor "DC's", so it's 4v5 and we're still pushing. The opponents were terrible, He Bo and myself would just rush in and wreck with Kuang picking off/weakening them. Our hades was 1-9. After his death, he "DC'd" too while we were trying to push pheonix. 3v5, We regroup and make a push and just smoke them one by one to finish the game. Now, i'm no pro at all, but that team was horrendous. Their Neith was sitting by the titan wall, crouched in her Ultimate, waiting for He Bo to get low while I just auto attacked her down. I think He Bo ended with 26 kills, I had 17 and Ao had 15. My previous best was winning 4v5 in assault, but that team actually put up a challenge, so it was a much sweeter victory, but i'm pretty sure me and He Bo could've duo'd that entire team last night.