Thankfully I haven't had too many like I have had guitars. I remember my 1st electric guitar amp was a little 2 speaker Boss amp along with my 1st electric guitar which was red B.C.Rich Rave II.
Once I started playing in basement/garage bands, I moved up to a Peavey Bandit 112. Not a bad amp but did not have that full tube tone. I had that amp for awhile until I joined Gut Wrench and needed to move up to a larger amp. I luckily was able to pickup a 1st generation Peavey 5150 with 412 cab used.
I kept that 1/2 stack until I had to sell off my gear to go to college. I gave up music for a number of years but periodically played for fun. Once I started playing again, I had picked up a Randall 212 combo that I started jamming around with. Once I started gigging again (Lethbridge) I bought a Peavey 6505+ Head and 412 Cab (with a little financial help). I used this setup during my time in Igniter and Gravity Crash, even adding a 2nd bottom 412 cab at one point.
I wish I could rave about that 6505+ but after a couple years, I started having problems with it. During a Gravity Crash rehearsal, it started smoking. It was before the warranty ran out so the local dealer repaired it. But then it started cutting out intermittently and I had it in for repairs and the issues repeated until the warranty was done. Then I sold it.
Then came my 1st Mesa Dual Rectifier Head that I paired with a cheap Peavey XXX 412 Cab. My favourite tone thus far. Had it for awhile and also pickup up some 412 and 212 Mesa Recto cabs. I also made a trade deal and grabbed a Peavey JSX head which I still own. Swapped the tubes from EL34s to 6L6 and a very nice underrated head. Better clean tones than the Peavey 5150 & 6505+ I formerly owned.
I traded that 1st Mesa Dual Recto head after awhile only to purchase another one (newer multi-watt version) that is my main amp head now. I still prefer to go through a Mesa Cab loaded with Celestion v30s as speakers truly make a difference. During my most recent gig with provided backline, I played the same head through a Marshall cab with Celestion G12t-75s and truly my tone lacked.
Only amp I would consider in the future is an EVH 5150iii. I always loved the 5150 gain sound and the newest model does sound pretty sweet. But I'm rather content with my Dual Recto.
But now with technology having advanced so much with great digital amp profilers like Kempers, would a digital setup is in the future be for me? Easier for travel and consistent tone with recording benefits. We'll wait and see...