more and more are people coming here from non-tracker software, so I think we all are curious to know hom many of us did not use a tracker before using Renoise. let’s count us then!
I’ve talked to a lot of ex-FL Studio converts. Myself included :3
I’ve always used trackers, but also flirted with cubase around 2000. That was because fasttracker didn’t run on my windows 98 pc. After some internerding I found madtracker and used this in combination with cubase. When someone directed me to renoise I ditched madtracker in the combo, and now I solely use renoise and wavelab.
i started off on ableton live. but i didnt like the way i kept getting stuck just making loops, and switching from session to arranger view didnt really work for me.
then came my mpc, great workflow, and i loved the feeling of banging on things,…yeah, i’m a drummer originally 
but it was a pain in the ass really, what with the transfering samples and saving and assigning pads etc.
then came cubase and i liked the linear flow of things but hated how much extra work it was to get even the simplest thing done. it did help cement the way i work as far as starting with an intro and progressing on to the end. used the mpc together with cubase, and thought i was pretty much set,…
and then jesus came to me in a dream and the rest is history 
you know the famous forum quote regarding trackers: “its a different way of working and you just got to get used to it”,… never had a problem with that.
renoise just works the way i like to work, which i think is why i had trouble with other software.
I mostly used Impulse Tracker, but also Cubase and FL. Actually I messed around with HammerHead and ModPlug as well.
I voted for both IT and Cubase, because I spent a lot of time with both.
Now it’s pretty much Renoise and Wavelab, just like jonas. I might use Reaper, tho, if I need some of its mixing features (PDC, groups, sidechaining…).
Before I got my hands on Renoise I was mainly doing chiptunes in FT2 and clones (Milkytracker lately).
I picked up Renoise as an extra tool aside from the other stuff I use (Sonar, MPC 1000, SP-505, Reason). It has quickly become very important, since I love to use it on my laptop, but it didn’t actually replace anything.
Same story as ermi, Impulse tracker for a couple of years, then Cubase for a couple of years, now Renoise for… how long? =)
started on Reason
then cubase
and finally renoise
makes cubase look so stupid 
FT2! So Renoise is like a dream come true
I’ve used Amiga Trackers (Noisetracker, Startrekker, Protracker, ahh!) before that, but mostly to play modules and look at the VU meters haha. If Buzz hadn’t been so unstable (and then dead) I probably would have gotten more into that, too.
I answered Fast Tracker but I was using Modplug & Mad Tracker for a bit because I was forced to find an alternative when I upgraded to windows 2000. I conisdered those merely Fast Tracker substitutes. Renoise is the new Fast Tracker and gets some love from me.
Protracker on the Amiga.
buzz and still using.
EDIT: btw. cant vote for ‘another tracker’ -> ‘buzz’
started with ModPlug in 2001, changed to Renoise in january 2007 - love it!
amiga OctaMED
later on, PC MED Soundstudio
DMC on C64, FT2, MT2 (finally stereosamples and atleast some effects), Renoise.
I actually bought my first Amiga back in 1988 just because of Sound Tracker I felt in love with it just after I had tried this wonderful program out over at a friends house, and since then I have had a long and passionated relationship with trackers of all kinds. Today Renoise is my main tool, but to be honest I also use cubase when I record vocals, guitars and other live instruments…
ProTracker - FastTrackerII - Cubase - Buzz - Renoise
Moved from Cubase to Renoise
Freed me from some kind of Cubase lazyness, now I can almost finish a track… 
man, from the replies, am i glad i dont own steinberg stock.