I've been an amp geek since I started playing bass. Even more excited about amps than basses. I tried a lot of amps and now, it makes me a little sad, but I leave it at home if I can (99% of the time actually). I switched to a Line 6 HX Stomp, some pedals and IEM. If I can't use IEM, I have monitors from FOH. Being able to go to play by train or bus is great.
I still have a couple of amps, but they rarely leave my house.
However, playing with what you like I think it makes play better (or more comfortable at least). 99% of the audience won't notice if you're using Fender, Yamaha, Ashdown, Orange, Ampeg... But they will notice if you are enjoying the gig.