rocknbil - 5:17 pm on May 24, 2011 (gmt 0)

It's not really a mater of "good" or "bad", I look at it more as "right tool for the job." If you're outputting HTML, use an HTML doctype. If your document requires features of XHTML - extending the DDT, etc. - use XHTML. So the answer for most of us is likely yes, an HTML doctype is fine.