Been maining WHM since 2014, and also had Summoner / Scholar as my ALT since then. Most expansions those were the only two classes I bothered getting to Max.

For the first time I've been max-leveling many more classes, and my favorites presently are Sage for Healing, Warrior for tanking, and Summoner for DPS. WHM will always be my WoL's "main" class though and hold a special place for me.

I also enjoy Dragoon & Bard (only 82 but will be 90 next), and occasionally Dancer. I prefer Summoner to them as aside from the visual spectacle, it's fairly easy not to have to be checking my bars for procs and can just enjoy the battle more. The random procs on Bard and Dancer reduce my overall enjoyment of those classes as I have to be checking my bar more often, though the support style is enjoyable to me overall so I still have them as some primary alts.

I have a few other classes at 90 but mostly don't play them anymore since I feel the other classes I've chosen fit my personality better.