Maybe its your resume?
Certainly you're experienced, but if you've had a long stretch without having to job-seek its possible your resume isn't in a contemporary style or doesn't use the right buzzwords, etc. Especially if you're looking at medium and large-sized studios the very first thing a resume has to do is get past the HR drones. Last month, after 5 years in my current position, I had to update my resume for a different role I was interested in inside the company -- It was a lot more work than I would have thought to bring my old resume 5 years forward all at once.
How are these companies that aren't interviewing you getting wind of your age anyways? If its in your resume or explicitly in any professional profiles you might consider removing or making that information less front-and-center. Hopefully I'm not out of step with the resume angle, its just the fact that they're apparently getting your age from it which gives me concern that it could be part of the issue.
Finally, some standard but seemingly-uncommon advice on job-seeking:
- Use your contacts -- I've read that referred resumes are 20x as likely to land a follow-up (phone screen or interview).
- Cover letters should always be customized to the position -- show interested in the company and position, and share why you think you'd be a great fit.
- Remember that the purpose of a resume is not to get a job, the purpose of a resume is to get an interview (or whatever next steps are).
- Stay positive -- If they're looking at your resume, they want to give you an interview; if they give you an interview, they want to hire you. its just the process of whittling down.
- Be aware -- The biggest reason job-seekers are cut short of the position they want is not lack of knowlege, its risk. Be specific about what you know and have done, and don't do anything that puts doubt in the hiring manager's mind about what you're really capable of. I know of enough who've tried to appear more knowlegable than they were, and it wasn't the lack of knowledge that killed them, it was the the grandstanding that painted them as a risk.