Every bulb in my house except one closet and two fluorescent tube fixtures in my garage is LED. Going on 3 years that way. I like the 40w equivalents in ceiling fans with 3 or 4 bulbs. 4 60's are too bright coming from one spot. Most of my lamps are 60w equivalent, all the bulbs in the bathrooms are 100w equivalent.
I have some PAR30 dimmable bulbs in my basement that haven't had any issue with a dimmer that is older than LEDs, so in my case I didn't have to change the dimmer but I have heard stories of people who get dimmable bulbs and then also have to change the dimmer anyway.
We have had only one issue so far, ceiling fans with the wattage regulator in two rooms. One had a remote control module that caused the bulbs to flash. I knew that was an issue with CFL's but wasn't expecting it with the LEDs. New module installed fixed the issue and the old remote works with the new module so now I have two for that room. Second fan was fine until a sudden power outage, that zapped the wattage limiter and caused those to flash. cut it out now good as new.