We've only been on one cruise & that was Holland America's from Florida to the Panama Canal and back to Ft. Lauderdale, Fla. about 8 years ago. No West Coast aspect at all. We only went because a couple of close friends, who we've traveled with have gone on a # of cruises and wanted us to try one. We didn't actively dislike it but I can't say that I would recommend it either. It was nice just hanging out on our balcony, watching the waves roll by, talking with our friends without any time stress. It was also nice to not have to worry about moving luggage or the many other little things that take up time during independent trips. And we met some interesting & friendly people as well - when you're on a cruise you get to know them better because they don't disappear after a dinner or bar drinks, but are around for days to continue to talk (or avoid, if need be). Since we weren't yet retired, the "decompression" effect of a cruise was good for us as well - not much (if any) tv, no real internet time, no cell phones, etc. That was very nice.
On the other hand, although I'll fondly remember the interesting land tours we took in Costa Rica & Panama City (as well as going thru the canal locks), but they were in general cookie cutter, designed for the "lowest common denominator", and (mostly) more surface than what we'd do on our own by far. We enjoyed the trips to a banana plantation & to Panama City's old section but would've done better on our own, especially if we hired a private guide. And the on board ship activities weren't very attractive to us either. Eating (food is ever present), gambling, sitting by the pool & drinking at the bar seemed to be the major activities for many & that just doesn't hold our interest for any length of time. We bought the cruise video afterwards and realized that we didn't even go to most of the on board things that were on it - and, based on the video, we'd make the same choice again. All seemed designed to create an artificial "we're having fun" atmosphere without any depth. That sounds harsher than I mean it to be, as I realize that they don't have any other option &, overall, we found things to do and weren't bored.
Best wishes on your 30th. Hope that was helpful, although a bit jaded.