I read somewhere, I think a few BassPlayer Mag issues back, how Geddy feels about bass solos. He believes that bass is not really a solo instrument and solos should be short and sweet. Get in and get out. Thats what he does. He really has no solos which are long but, it's those short bursts of talent that never cease to amaze me. The tone, the dexterity, the quality, with never an overplayed part. The way his melodies interplay with the entirety of the song. The breaks are always powerful and up front without being obnoxiuos or trying to be the lead instrument. And his structural lines are always tasteful, well thought out and interesting.
Personally, I think thier most creative period was between Farewell To Kings and peaked at Moving Pictures but their is always something on every album I can find appealing.
Personally, I like the more intensive playing like YYZ, and La Villa Strangiato. But some of the more simple yet creative lines like Lessons, Vital Signs and Body Electric are equally enjoyable.
There is something about every note that is sweet in the majority of his playing. He ties in well with Peart's kick where it sounds like it is one overall punchy sound that is hard to describe. Listen to Superconductor for that sound. Geddy also thinks Jeff Berlin is one of his favorite as do I.