Delph's progress has been hampered by injuries since he joined the club from Leeds United in 2009.
But the 22-year-old has made an encouraging start this term under new boss Paul Lambert.
"I feel good. I feel stronger than I have in the past," said Delph to Villa's website. "I started the season then ended up out of the team but I've been working hard and managed to get back in.
"I'm pleased with that but I want to push on, do better and have a lot more of an impact that I have done.
"I had a good run last year but obviously I wasn't fully fit. I am now and it is nice to be fully fit.
"People judge you when you get a run of games in the team and it is nice to be judged when you are fully fit."