I would like to see a DMC2, I found it odd Capcom went from 1 to 3.
Jokes aside I'd pick the series with a better Dante, better gameplay, and better writing. 3 actually had a decent story inbetween the moments of crazy, obviously it's not some deep artistic thing, but it was enough to give Dante daddy issues character development. 4's story is pretty bad, but the boss banter is the best in the series, the videos are posted often even in non-DMC topics because people find them entertaining. It's much better than FUCK YOUUUUAHHRGAPBBBHHHH. Not to mention since each fully capitalized DMC game improves over the next DMC5's gameplay should be even more amazing. I'd be happy if they mix 3's variety of weapons and styles with 4's ability to switch on the fly.