I'm primarily a guitarist too, and for a long time I'd always start with a drum loop and the guitars, before adding in other tracks.
However, recently I've started by starting with the bass guitars, and I think I'm getting better results. Here's why - historically, the bass has always been more of an afterthought for me, so once all the guitars are tracked, I'd go back and record a few takes and, just to get it over with, go with the first one that was pretty decent.
However, the problem with this is generally I usually evaluate the tracks in the context of the mix, and slight irregularities in a bass performance don't really leap out at you THAT much. As a consequence, my bass tracks (which, again, bass is not my primary instrument so I'm a much better guitarist anyway) would always be a little sloppier than my guitar tracks. This isn't necessarily a problem per se, as it'd always sound "ok" in the mix, but I also feel like the "groove" of a song is carried by the drums and bass, and a really tight, in-the-pocket bass line is just easier to mix and makes the whole piece cohere a bit better.
So, by starting with the bass track and then recording takes after take (and punching in if needed) until I had a really "in the groove" bass track, and then putting guitars on top of that (which as a guitarist I tend to care more about and be better at playing anyway, so sloppiness is way less of a problem) the resulting guitar/bass/drums rhythm performance is just better overall.
As an added bonus, once I have a pretty good picture of what the bass is going to "sound" like, it's easier to dial in a guitar sound to "fit" with the bass tracks.
Long story short, sometimes starting with a weaker instrument is actually a good thing, since it forces you to scrutinize it solo'd, which psychologically makes it harder to accept a sub-par performance.