For now, I've watched the first episode of Steins;Gate only. I'm not one to formulate an opinion on a series based on the first episode only, so I'll wait for more episode in order to express myself. But one things that bothered me a bit was Mamoru Miyano. He did a fantastic mad scientist, but I don't know, his voice seems a bit too young for the characters. I'll probably take some time to adapt myself.