Lol, ok.
Add:
- sportswear (instead of gym, for anything having to do with sports)
- wilderness (like rocks, hills, etc outside of the city, but still not forest or meadow)
- random item tag for mast. device is a device for mast (like vibrator), random item is a book, weapon, furniture, etc.
Remove:
- bazooka (if you really added that

)
- passive (all that not active is passive)
- deepthroat (too detailed to me, there are other types of bj, but we don't use them, right?)
- selfpleasure (pretty much synonym to mast, why bother?)
- deflowered (I usually avoid such pics, since they could be used only once at best, and not all characters are virgins anyway)
- caressed (we have hug, kiss, finger/lick, squeezes tits, what else can you caress that much?)
- forced (=bdsm main tag, or scared/etc tags)
- beast/tentacles
- meditating (way too rare, i think, even though I like this tag)
- gardening (same)
- walking/talking (we don't have animated pics anyway, so it's vague thing)
- running/sport (and use exercising only)
- no bg (=quest, even if we'll have a lot of such pics)
- long dress (=formal or fashionable)
- santa (we don't have new Year)
- secretary (=formal)
- whore (kinda vague)
- maybe yukata (quite common, but = formal dress to me)
- maybe schoolgirl too (there are a lot of school pics, but how is this tag useful for the code?)
- maybe uniform (what is uniform in the given context anyway? not sure I understand)
- basement (=dungeon)
- empty room (usually you can't tell if the room is completely empty, so = generic indoor)
- office (too specific)
- shack (same)
- stable (same)
- stairs (=generic)
- maybe studio (I know rudi wants to keep it, but it still seems way too rare to me)
- workshop (same, don't recall any workshop pics)
- harbor (rare, often=beach)
- hills (don't recall any hills in all my packs)
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You could keep some not too rare tags if you want, but I wonder if they will be useful for the code, considering their rarity.