I tend to giggle a bit, but not really laugh loudly. I'm the type who doesn't actually laugh much even if I think something's funny. Then suddenly, one little thing sends me over the edge and the pent up laughter bursts into a really big belly laugh. I do try to get one of those at least once a day though. But normally... The most I do is a little giggle...But occasionally, yep. :)
I actually don't write "lol" that often though. Just on occasion....Okay, maybe more than on occasion, but...Not as often as other people I've seen.