A lot of people are very hard on him.
With current trends, things that are old are in again, so you have a lot of people dogging the TNG, DS9, VOY era and singing the wonders of TOS.
I grew up on TNG and the ST films. I always really liked Kirk in the films, and wanted to see the original TV series, but my family didn't have cable and there was no way to watch it. Then one year between seasons of TNG instead of airing TNG reruns they ran episodes of the original series. I was super excited about this and really enjoyed them, but even as a nine or ten year old, I felt the show was really silly and outdated.
I've never been able to get that into the original series, so I suppose the Rick Berman era Star Trek is my Star Trek. A lot of people would probably respond with, "Boo, you are a real Star Trek fan if you don't think TOS is the best!" if they read me say all of this. Fine, I am not a real Star Trek fan, and I won't claim to be. But I do really enjoy TNG, DS9, bits of Voyager, and the TNG crew films. This whole stretch of time was during Berman's reign as executive producer, so I guess I'm more of a fan of Berman's Star Trek than Roddenberry's.