Ι a Samick electric bass (that was the first one), an Ibanez ectro-acoustic bass (don't remember the exactly model right now, AEsomething...) and mainly i play with a Warwick Corvete Bubinga (4 string) bass). I have already trasformed the Samick bass into a frettless bass. (It was very interesting, as i made it by myself!). Both electric basses are passive.
My amp is an Ampeg amplifier (BA-108) at home and a bigger Hartke at "studio".
I use no extra effects (exept the bass contols of course), and the strings i use are from Thomastic..
As for my Band, we are just a friend-team (now we 6 persons, electric guitar, acoustic, bass, drums, accordion, violin, vocals). At this time we make our music, but nothing prfessional, just as a hideaway from the daily routine. In the past we were more persons and instruments too (cahon, flute, bouzouki, clarinet ...). Our style is a big mix, from the music we like (rock, progressive, ethnic, e.t.c...)
And, yes, i'm not so good too, but i love music and i like playing the bass...
Sounds like you've got an interesting mix in your band... I imagine it has a big sound.
I have been playing bass for about 4 years now and its really enjoyable, Simple yet you can master it!