I haven't flown with any bitter Captains...or crusty ones...or really rude ones. They've all been quite pleasant. I've had a jerk or two, a non-stop touch everything even though its the FO's leg, and one that intimidated the hell out of me because he had over 10,000 hrs in the ATR and pretty much mind-melded with the machine and had no true need for an FO. But no really crusty, bitter, miserable old people. My opinion has always been respected and my input valued, I've been treated well and respected.

One the whole, I find having older Captains around is a good thing. I have learned a lot from the people I've flown with - things they have learned over years and YEARS of experience. Compare that with a person who was an FO for 2 or 3 years before upgrading to CA - they may have a small amount of knowledge to pass on compared to the guy with 10,000 in the plane. I prefer having that knowledge there.

(PS, the 10,000+ hour guy did not purposely intimidate me, I allowed myself to be intimidated because he had 200 times my time in the aircraft and I didn't think I would do anything right for him.)