I started with LMMS because unlike people that just want to be famous and have no problem pirating commercial software, I detest piracy. As a broke highschooler that meant my options were very limited, and since I was just testing the production waters anyway, I opted to go the freeware route.
As I have progressed and picked up some skill, LMMS has started to finally feel limiting, but as a beginning artist, this software suited my needs perfectly. As it was originally supposed to be a freeware alternative to FL, transitioning from LMMS to FL Studio was not difficult.
It's very good. Free. Gives you all the features of FL Studio for free. I recommend this for anyone into music making.
FL + Ableton = LMMS... The only thing is that it doesn't have good sounding plugins but it have vst availability, so... nice in my opinion... It has both pattern editor as in FL and step sequencer as in Ableton...
I just got this a few days ago and have been using it to sketch out ideas on any pc I don't have ableton on, it works with any and all vst plugins 64 or 32 bit and is very easy to use for experienced musicmakers.